<!DOCTYPE html><!-- BaNnErBlUrFlE-BoDy-start -->
<!-- Preheader Text : BEGIN -->
<div style="display:none !important;display:none;visibility:hidden;mso-hide:all;font-size:1px;color:#ffffff;line-height:1px;height:0px;max-height:0px;opacity:0;overflow:hidden;">
hi Barry, On 28/05/24 7: 46 am, Barry Smith wrote: Thanks for reporting this. It is a bug. I have a fixed branch barry/2024-05-27/fix-bug-baij-setvaluesblocked/release and associated merge request https: //gitlab. com/petsc/petsc/-/merge_requests/7578
</div>
<!-- Preheader Text : END -->
<!-- Email Banner : BEGIN -->
<div style="display:none !important;display:none;visibility:hidden;mso-hide:all;font-size:1px;color:#ffffff;line-height:1px;height:0px;max-height:0px;opacity:0;overflow:hidden;">ZjQcmQRYFpfptBannerStart</div>
<!--[if ((ie)|(mso))]>
<table border="0" cellspacing="0" cellpadding="0" width="100%" style="padding: 16px 0px 16px 0px; direction: ltr" ><tr><td>
<table border="0" cellspacing="0" cellpadding="0" style="padding: 0px 10px 5px 6px; width: 100%; border-radius:4px; border-top:4px solid #90a4ae;background-color:#D0D8DC;"><tr><td valign="top">
<table align="left" border="0" cellspacing="0" cellpadding="0" style="padding: 4px 8px 4px 8px">
<tr><td style="color:#000000; font-family: 'Arial', sans-serif; font-weight:bold; font-size:14px; direction: ltr">
This Message Is From an External Sender
</td></tr>
<tr><td style="color:#000000; font-weight:normal; font-family: 'Arial', sans-serif; font-size:12px; direction: ltr">
This message came from outside your organization.
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
<![endif]-->
<![if !((ie)|(mso))]>
<div dir="ltr" id="pfptBannervjwmx7g" style="all: revert !important; display:block !important; text-align: left !important; margin:16px 0px 16px 0px !important; padding:8px 16px 8px 16px !important; border-radius: 4px !important; min-width: 200px !important; background-color: #D0D8DC !important; background-color: #D0D8DC; border-top: 4px solid #90a4ae !important; border-top: 4px solid #90a4ae;">
<div id="pfptBannervjwmx7g" style="all: unset !important; float:left !important; display:block !important; margin: 0px 0px 1px 0px !important; max-width: 600px !important;">
<div id="pfptBannervjwmx7g" style="all: unset !important; display:block !important; visibility: visible !important; background-color: #D0D8DC !important; color:#000000 !important; color:#000000; font-family: 'Arial', sans-serif !important; font-family: 'Arial', sans-serif; font-weight:bold !important; font-weight:bold; font-size:14px !important; line-height:18px !important; line-height:18px">
This Message Is From an External Sender
</div>
<div id="pfptBannervjwmx7g" style="all: unset !important; display:block !important; visibility: visible !important; background-color: #D0D8DC !important; color:#000000 !important; color:#000000; font-weight:normal; font-family: 'Arial', sans-serif !important; font-family: 'Arial', sans-serif; font-size:12px !important; line-height:18px !important; line-height:18px; margin-top:2px !important;">
This message came from outside your organization.
</div>
</div>
<div style="clear: both !important; display: block !important; visibility: hidden !important; line-height: 0 !important; font-size: 0.01px !important; height: 0px"> </div>
</div>
<![endif]>
<div style="display:none !important;display:none;visibility:hidden;mso-hide:all;font-size:1px;color:#ffffff;line-height:1px;height:0px;max-height:0px;opacity:0;overflow:hidden;">ZjQcmQRYFpfptBannerEnd</div>
<!-- Email Banner : END -->
<!-- BaNnErBlUrFlE-BoDy-end -->
<html><head><!-- BaNnErBlUrFlE-HeAdEr-start -->
<style>
#pfptBannervjwmx7g { all: revert !important; display: block !important;
visibility: visible !important; opacity: 1 !important;
background-color: #D0D8DC !important;
max-width: none !important; max-height: none !important }
.pfptPrimaryButtonvjwmx7g:hover, .pfptPrimaryButtonvjwmx7g:focus {
background-color: #b4c1c7 !important; }
.pfptPrimaryButtonvjwmx7g:active {
background-color: #90a4ae !important; }
</style>
<!-- BaNnErBlUrFlE-HeAdEr-end -->
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<p>hi Barry,<br>
</p>
<div class="moz-cite-prefix">On 28/05/24 7:46 am, Barry Smith wrote:<br>
</div>
<blockquote type="cite" cite="mid:7C12E83C-CE60-4DEF-8999-ADD22D09A69D@petsc.dev">
<div><br>
</div>
Thanks for reporting this. It is a bug. I have a fixed branch <b style="color: rgb(200, 20, 201); font-family: Menlo; font-size: 14px;">barry/2024-05-27/fix-bug-baij-setvaluesblocked/release </b> and
associated merge request <a href="https://urldefense.us/v3/__https://gitlab.com/petsc/petsc/-/merge_requests/7578__;!!G_uCfscf7eWS!e6Dvthc2K4dBRQ77JiOwCRZkPap2KZithO5HtDmQtF_1UGlC1EcRKJgoykBF54djkl1-_gepUhj95-78_S9dbu-68mw6cemp$" moz-do-not-send="true" class="moz-txt-link-freetext">https://gitlab.com/petsc/petsc/-/merge_requests/7578</a>
<div><br>
</div>
</blockquote>
<p>Thanks very much, that does appear to fix the bug when I run my
test program in serial.</p>
<p>If I run it on 2 processes, it is OK with AIJ matrix type, but
with BAIJ I get an error (see below). Is there another problem, or
I am doing something else wrong?</p>
<p>- Adrian<br>
</p>
<p>[0]PETSC ERROR: --------------------- Error Message
--------------------------------------------------------------<br>
[0]PETSC ERROR: Petsc has generated inconsistent data<br>
[0]PETSC ERROR: Incorrect colmap<br>
[0]PETSC ERROR: See <a class="moz-txt-link-freetext" href="https://urldefense.us/v3/__https://petsc.org/release/faq/__;!!G_uCfscf7eWS!e6Dvthc2K4dBRQ77JiOwCRZkPap2KZithO5HtDmQtF_1UGlC1EcRKJgoykBF54djkl1-_gepUhj95-78_S9dbu-68p6qYDHU$">https://petsc.org/release/faq/</a> for trouble
shooting.<br>
[0]PETSC ERROR: Petsc Release Version 3.21.1, unknown <br>
[0]PETSC ERROR: ./matmodify on a main-debug named EN438880 by
acro018 Tue May 28 13:33:46 2024<br>
[0]PETSC ERROR: Configure options --with-x --download-hdf5
--download-zlib --download-netcdf --download-pnetcdf
--download-exodusii --download-triangle --download-ptscotch
--download-chaco --download-hypre<br>
[0]PETSC ERROR: #1 MatSetValuesBlocked_MPIBAIJ() at
/home/acro018/software/PETSc/code/src/mat/impls/baij/mpi/mpibaij.c:448<br>
[0]PETSC ERROR: #2 MatSetValuesBlocked() at
/home/acro018/software/PETSc/code/src/mat/interface/matrix.c:2030<br>
[0]PETSC ERROR: --------------------- Error Message
--------------------------------------------------------------<br>
[0]PETSC ERROR: It appears a new error in the code was triggered
after a previous error, possibly because:<br>
[0]PETSC ERROR: - The first error was not properly handled via
(for example) the use of<br>
[0]PETSC ERROR: PetscCall(TheFunctionThatErrors()); or<br>
[0]PETSC ERROR: - The second error was triggered while handling
the first error.<br>
[0]PETSC ERROR: Above is the traceback for the previous
unhandled error, below the traceback for the next error<br>
[0]PETSC ERROR: ALL ERRORS in the PETSc libraries are fatal, you
should add the appropriate error checking to the code<br>
[0]PETSC ERROR: Petsc has generated inconsistent data<br>
[0]PETSC ERROR: Incorrect colmap<br>
[0]PETSC ERROR: See <a class="moz-txt-link-freetext" href="https://urldefense.us/v3/__https://petsc.org/release/faq/__;!!G_uCfscf7eWS!e6Dvthc2K4dBRQ77JiOwCRZkPap2KZithO5HtDmQtF_1UGlC1EcRKJgoykBF54djkl1-_gepUhj95-78_S9dbu-68p6qYDHU$">https://petsc.org/release/faq/</a> for trouble
shooting.<br>
[0]PETSC ERROR: Petsc Release Version 3.21.1, unknown <br>
[0]PETSC ERROR: ./matmodify on a main-debug named EN438880 by
acro018 Tue May 28 13:33:46 2024<br>
[0]PETSC ERROR: Configure options --with-x --download-hdf5
--download-zlib --download-netcdf --download-pnetcdf
--download-exodusii --download-triangle --download-ptscotch
--download-chaco --download-hypre<br>
[0]PETSC ERROR: #1 MatSetValuesBlocked_MPIBAIJ() at
/home/acro018/software/PETSc/code/src/mat/impls/baij/mpi/mpibaij.c:448<br>
[0]PETSC ERROR: #2 MatAssemblyEnd_MPIBAIJ() at
/home/acro018/software/PETSc/code/src/mat/impls/baij/mpi/mpibaij.c:943<br>
[0]PETSC ERROR: #3 MatAssemblyEnd() at
/home/acro018/software/PETSc/code/src/mat/interface/matrix.c:5820<br>
[0]PETSC ERROR: #4 matmodify.F90:40<br>
</p>
<p><br>
</p>
<blockquote type="cite" cite="mid:7C12E83C-CE60-4DEF-8999-ADD22D09A69D@petsc.dev">
<div> Barry</div>
<div><br>
<div><br>
<blockquote type="cite">
<div>On May 26, 2024, at 10:45 PM, Adrian Croucher
<a class="moz-txt-link-rfc2396E" href="mailto:a.croucher@auckland.ac.nz"><a.croucher@auckland.ac.nz></a> wrote:</div>
<br class="Apple-interchange-newline">
<div>
<div>
<p>hi,</p>
<p>I've been trying creating a matrix with
DMCreateMatrix() and then adding extra blocks of
nonzeros into it using MatSetValuesBlocked(), but
getting some unexpected results if I set the matrix
type to BAIJ. It seems to behave as expected if I use
matrix type AIJ.</p>
<p>I've attached a minimal example program. It reads in
the DMPlex from file, sets up a section on it, creates
a matrix (blocksize 2) and then inserts a single 2x2
block at global block indices (0,7). It views the
matrix before and after the insertion.<br>
</p>
<p>If I run with "-dm_mat_type aij" it gives the
expected results, but with "-dm_mat_type baij" it
doesn't - e.g. if run in serial, it adds the new
nonzeros in the right place but also adds a whole lot
of other duplicated entries in block row 0.<br>
</p>
<p>Is there something I'm not understanding about BAIJ,
or about MatSetValuesBlocked()? or possibly some other
mistake?<br>
</p>
<p>- Adrian<br>
</p>
<div class="moz-cite-prefix">On 20/05/24 12:24 pm, Barry
Smith wrote:<br>
</div>
<blockquote type="cite" cite="mid:4368DA96-759E-4831-8BCF-710F265A4728@petsc.dev">
<div><br>
</div>
You can call
MatSetOption(mat,MAT_NEW_NONZERO_LOCATION_ERR) then
insert the new values. If it is just a handful of new
insertions the extra time should be small.
<div><br>
</div>
<div> Making a copy of the matrix won't give you a
new matrix that is any faster to insert into so best
to just use the same matrix.</div>
<div><br>
</div>
<div> Barry</div>
<div><br id="lineBreakAtBeginningOfMessage">
<div><br>
<blockquote type="cite">
<div>On May 19, 2024, at 7:44 PM, Adrian
Croucher <a class="moz-txt-link-rfc2396E" href="mailto:a.croucher@auckland.ac.nz" moz-do-not-send="true"><a.croucher@auckland.ac.nz></a>
wrote:</div>
<br class="Apple-interchange-newline">
<div>
<div dir="ltr" id="pfptBannerk8ad5io" style="color-scheme: revert !important; writing-mode: revert !important; -webkit-ruby-position: revert !important; color: revert !important; font-family: revert !important; font-feature-settings: revert !important; font-kerning: revert !important; font-optical-sizing: revert !important; font-palette: revert !important; font-size: revert !important; font-size-adjust: revert !important; font-stretch: revert !important; font-style: revert !important; font-synthesis-small-caps: revert !important; font-synthesis-style: revert !important; font-synthesis-weight: revert !important; font-variant-alternates: revert !important; font-variant-caps: revert !important; font-variant-east-asian: revert !important; font-variant-emoji: revert !important; font-variant-ligatures: revert !important; font-variant-numeric: revert !important; font-variant-position: revert !important; font-variation-settings: revert !important; font-weight: revert !important; text-orientation: revert !important; text-rendering: revert !important; zoom: revert !important; -webkit-font-smoothing: revert !important; -webkit-locale: revert !important; -webkit-text-size-adjust: revert !important; -webkit-text-zoom: revert !important; letter-spacing: revert !important; text-autospace: revert !important; text-spacing-trim: revert !important; accent-color: revert !important; align-content: revert !important; align-items: revert !important; align-self: revert !important; alignment-baseline: revert !important; alt: revert !important; animation-composition: revert !important; animation: revert !important; animation-timeline: revert !important; appearance: revert !important; aspect-ratio: revert !important; backface-visibility: revert !important; background-attachment: revert !important; background-blend-mode: revert !important; background-image: revert !important; background-position: revert !important; background-repeat: revert !important; background-size: revert !important; baseline-shift: revert !important; block-step-insert: revert !important; block-step-size: revert !important; border-collapse: revert !important; border-image: revert !important; box-sizing: revert !important; break-after: revert !important; break-before: revert !important; break-inside: revert !important; buffered-rendering: revert !important; caption-side: revert !important; caret-color: revert !important; clear: revert !important; clip: revert !important; clip-path: revert !important; clip-rule: revert !important; color-interpolation: revert !important; color-interpolation-filters: revert !important; column-count: revert !important; column-fill: revert !important; column-gap: revert !important; column-rule-color: revert !important; column-rule-style: revert !important; column-rule-width: revert !important; column-span: revert !important; column-width: revert !important; contain: revert !important; container-name: revert !important; container-type: revert !important; content: revert !important; content-visibility: revert !important; counter-increment: revert !important; counter-reset: revert !important; counter-set: revert !important; cursor: revert !important; cx: revert !important; cy: revert !important; dominant-baseline: revert !important; empty-cells: revert !important; fill: revert !important; fill-opacity: revert !important; fill-rule: revert !important; filter: revert !important; flex: revert !important; flex-flow: revert !important; float: revert !important; flood-color: revert !important; flood-opacity: revert !important; glyph-orientation-horizontal: revert !important; glyph-orientation-vertical: revert !important; grid: revert !important; grid-column-end: revert !important; grid-column-start: revert !important; grid-row-end: revert !important; grid-row-start: revert !important; hanging-punctuation: revert !important; hyphenate-character: revert !important; hyphens: revert !important; image-orientation: revert !important; image-rendering: revert !important; input-security: revert !important; isolation: revert !important; justify-content: revert !important; justify-items: revert !important; justify-self: revert !important; kerning: revert !important; lighting-color: revert !important; line-break: revert !important; line-height: revert !important; list-style: revert !important; margin-trim: revert !important; marker: revert !important; mask: revert !important; mask-size: revert !important; mask-type: revert !important; masonry-auto-flow: revert !important; math-style: revert !important; mix-blend-mode: revert !important; object-fit: revert !important; object-position: revert !important; offset-anchor: revert !important; offset-distance: revert !important; offset-path: revert !important; offset-position: revert !important; offset-rotate: revert !important; order: revert !important; orphans: revert !important; outline: revert !important; outline-offset: revert !important; overflow-anchor: revert !important; overflow-wrap: revert !important; overflow: revert !important; page: revert !important; paint-order: revert !important; perspective: revert !important; perspective-origin: revert !important; pointer-events: revert !important; position: revert !important; print-color-adjust: revert !important; quotes: revert !important; r: revert !important; resize: revert !important; rotate: revert !important; row-gap: revert !important; rx: revert !important; ry: revert !important; scale: revert !important; scroll-behavior: revert !important; scroll-snap-align: revert !important; scroll-snap-stop: revert !important; scroll-snap-type: revert !important; scroll-timeline: revert !important; scrollbar-color: revert !important; scrollbar-gutter: revert !important; scrollbar-width: revert !important; shape-image-threshold: revert !important; shape-margin: revert !important; shape-outside: revert !important; shape-rendering: revert !important; size: revert !important; speak-as: revert !important; stop-color: revert !important; stop-opacity: revert !important; stroke: revert !important; stroke-color: revert !important; stroke-dasharray: revert !important; stroke-dashoffset: revert !important; stroke-linecap: revert !important; stroke-linejoin: revert !important; stroke-miterlimit: revert !important; stroke-opacity: revert !important; stroke-width: revert !important; tab-size: revert !important; table-layout: revert !important; text-align: left !important; text-align-last: revert !important; text-anchor: revert !important; text-box-edge: revert !important; text-box-trim: revert !important; text-decoration-color: revert !important; text-decoration: revert !important; text-decoration-skip-ink: revert !important; text-decoration-style: revert !important; text-decoration-thickness: revert !important; text-emphasis-color: revert !important; text-emphasis-position: revert !important; text-emphasis-style: revert !important; text-group-align: revert !important; text-indent: revert !important; text-justify: revert !important; text-overflow: revert !important; text-shadow: revert !important; text-transform: revert !important; text-underline-offset: revert !important; text-underline-position: revert !important; text-wrap: revert !important; touch-action: revert !important; transform: revert !important; transform-box: revert !important; transform-origin: revert !important; transform-style: revert !important; transition: revert !important; translate: revert !important; vector-effect: revert !important; vertical-align: revert !important; view-timeline: revert !important; view-transition-name: revert !important; white-space: revert !important; widows: revert !important; will-change: revert !important; word-break: revert !important; x: revert !important; y: revert !important; z-index: revert !important; -apple-color-filter: revert !important; -apple-pay-button-style: revert !important; -apple-pay-button-type: revert !important; -internal-text-autosizing-status: revert !important; border-spacing: revert !important; -webkit-box-align: revert !important; -webkit-box-decoration-break: revert !important; -webkit-box-direction: revert !important; -webkit-box-flex: revert !important; -webkit-box-flex-group: revert !important; -webkit-box-lines: revert !important; -webkit-box-ordinal-group: revert !important; -webkit-box-orient: revert !important; -webkit-box-pack: revert !important; -webkit-box-reflect: revert !important; -webkit-column-axis: revert !important; -webkit-column-progression: revert !important; -webkit-cursor-visibility: revert !important; -webkit-font-size-delta: revert !important; -webkit-hyphenate-limit-after: revert !important; -webkit-hyphenate-limit-before: revert !important; -webkit-hyphenate-limit-lines: revert !important; -webkit-initial-letter: revert !important; -webkit-line-align: revert !important; -webkit-line-box-contain: revert !important; -webkit-line-clamp: revert !important; -webkit-line-grid: revert !important; -webkit-line-snap: revert !important; -webkit-marquee-direction: revert !important; -webkit-marquee-increment: revert !important; -webkit-marquee-repetition: revert !important; -webkit-marquee-speed: revert !important; -webkit-marquee-style: revert !important; -webkit-nbsp-mode: revert !important; -webkit-rtl-ordering: revert !important; -webkit-text-decorations-in-effect: revert !important; -webkit-text-fill-color: revert !important; -webkit-text-security: revert !important; -webkit-text-stroke-color: revert !important; -webkit-text-stroke-width: revert !important; -webkit-user-drag: revert !important; -webkit-user-modify: revert !important; -webkit-user-select: revert !important; word-spacing: revert !important; backdrop-filter: revert !important; background-clip: revert !important; background-origin: revert !important; box-shadow: revert !important; mask-composite: revert !important; mask-mode: revert !important; text-combine-upright: revert !important; -webkit-backdrop-filter: revert !important; -webkit-background-clip: revert !important; -webkit-background-origin: revert !important; -webkit-box-shadow: revert !important; -webkit-mask: revert !important; -webkit-mask-composite: revert !important; -webkit-mask-source-type: revert !important; -webkit-text-combine: revert !important; display: block !important; visibility: revert !important; opacity: revert !important; background-color: rgb(208, 216, 220) !important; block-size: revert !important; border-block: revert !important; border-bottom-color: revert !important; border-bottom-style: revert !important; border-bottom-width: revert !important; border-end-end-radius: revert !important; border-end-start-radius: revert !important; border-inline: revert !important; border-left-color: revert !important; border-left-style: revert !important; border-left-width: revert !important; border-right-color: revert !important; border-right-style: revert !important; border-right-width: revert !important; border-start-end-radius: revert !important; border-start-start-radius: revert !important; inset: revert !important; contain-intrinsic-block-size: revert !important; contain-intrinsic-size: revert !important; contain-intrinsic-inline-size: revert !important; height: revert !important; inline-size: revert !important; inset-block: revert !important; inset-inline: revert !important; margin-block: revert !important; margin-inline: revert !important; max-block-size: revert !important; max-height: revert !important; max-inline-size: revert !important; max-width: revert !important; min-block-size: revert !important; min-height: revert !important; min-inline-size: revert !important; overscroll-behavior-block: revert !important; overscroll-behavior-inline: revert !important; overscroll-behavior: revert !important; padding-block: revert !important; padding-inline: revert !important; scroll-margin-block: revert !important; scroll-margin: revert !important; scroll-margin-inline: revert !important; scroll-padding-block: revert !important; scroll-padding: revert !important; scroll-padding-inline: revert !important; width: revert !important; margin: 16px 0px !important; padding: 8px 16px !important; border-radius: 4px !important; min-width: 200px !important; border-top-width: 4px !important; border-top-style: solid !important; border-top-color: rgb(144, 164, 174) !important;">
<div id="pfptBannerk8ad5io" style="color-scheme: unset !important; writing-mode: unset !important; -webkit-ruby-position: unset !important; color: unset !important; font-family: unset !important; font-feature-settings: unset !important; font-kerning: unset !important; font-optical-sizing: unset !important; font-palette: unset !important; font-size: unset !important; font-size-adjust: unset !important; font-stretch: unset !important; font-style: unset !important; font-synthesis-small-caps: unset !important; font-synthesis-style: unset !important; font-synthesis-weight: unset !important; font-variant-alternates: unset !important; font-variant-caps: unset !important; font-variant-east-asian: unset !important; font-variant-emoji: unset !important; font-variant-ligatures: unset !important; font-variant-numeric: unset !important; font-variant-position: unset !important; font-variation-settings: unset !important; font-weight: unset !important; text-orientation: unset !important; text-rendering: unset !important; zoom: unset !important; -webkit-font-smoothing: unset !important; -webkit-locale: unset !important; -webkit-text-size-adjust: unset !important; -webkit-text-zoom: unset !important; letter-spacing: unset !important; text-autospace: unset !important; text-spacing-trim: unset !important; accent-color: unset !important; align-content: unset !important; align-items: unset !important; align-self: unset !important; alignment-baseline: unset !important; alt: unset !important; animation-composition: unset !important; animation: unset !important; animation-timeline: unset !important; appearance: unset !important; aspect-ratio: unset !important; backface-visibility: unset !important; background: unset !important; background-blend-mode: unset !important; baseline-shift: unset !important; block-step-insert: unset !important; block-step-size: unset !important; border-collapse: unset !important; border: unset !important; box-sizing: unset !important; break-after: unset !important; break-before: unset !important; break-inside: unset !important; buffered-rendering: unset !important; caption-side: unset !important; caret-color: unset !important; clear: unset !important; clip: unset !important; clip-path: unset !important; clip-rule: unset !important; color-interpolation: unset !important; color-interpolation-filters: unset !important; column-count: unset !important; column-fill: unset !important; column-gap: unset !important; column-rule-color: unset !important; column-rule-style: unset !important; column-rule-width: unset !important; column-span: unset !important; column-width: unset !important; contain: unset !important; container-name: unset !important; container-type: unset !important; content: unset !important; content-visibility: unset !important; counter-increment: unset !important; counter-reset: unset !important; counter-set: unset !important; cursor: unset !important; cx: unset !important; cy: unset !important; dominant-baseline: unset !important; empty-cells: unset !important; fill: unset !important; fill-opacity: unset !important; fill-rule: unset !important; filter: unset !important; flex: unset !important; flex-flow: unset !important; float: left !important; flood-color: unset !important; flood-opacity: unset !important; glyph-orientation-horizontal: unset !important; glyph-orientation-vertical: unset !important; grid: unset !important; grid-column-end: unset !important; grid-column-start: unset !important; grid-row-end: unset !important; grid-row-start: unset !important; hanging-punctuation: unset !important; hyphenate-character: unset !important; hyphens: unset !important; image-orientation: unset !important; image-rendering: unset !important; input-security: unset !important; isolation: unset !important; justify-content: unset !important; justify-items: unset !important; justify-self: unset !important; kerning: unset !important; lighting-color: unset !important; line-break: unset !important; line-height: unset !important; list-style: unset !important; margin-trim: unset !important; marker: unset !important; mask: unset !important; mask-size: unset !important; mask-type: unset !important; masonry-auto-flow: unset !important; math-style: unset !important; mix-blend-mode: unset !important; object-fit: unset !important; object-position: unset !important; offset-anchor: unset !important; offset-distance: unset !important; offset-path: unset !important; offset-position: unset !important; offset-rotate: unset !important; order: unset !important; orphans: unset !important; outline: unset !important; outline-offset: unset !important; overflow-anchor: unset !important; overflow-wrap: unset !important; overflow: unset !important; page: unset !important; paint-order: unset !important; perspective: unset !important; perspective-origin: unset !important; pointer-events: unset !important; position: unset !important; print-color-adjust: unset !important; quotes: unset !important; r: unset !important; resize: unset !important; rotate: unset !important; row-gap: unset !important; rx: unset !important; ry: unset !important; scale: unset !important; scroll-behavior: unset !important; scroll-snap-align: unset !important; scroll-snap-stop: unset !important; scroll-snap-type: unset !important; scroll-timeline: unset !important; scrollbar-color: unset !important; scrollbar-gutter: unset !important; scrollbar-width: unset !important; shape-image-threshold: unset !important; shape-margin: unset !important; shape-outside: unset !important; shape-rendering: unset !important; size: unset !important; speak-as: unset !important; stop-color: unset !important; stop-opacity: unset !important; stroke: unset !important; stroke-color: unset !important; stroke-dasharray: unset !important; stroke-dashoffset: unset !important; stroke-linecap: unset !important; stroke-linejoin: unset !important; stroke-miterlimit: unset !important; stroke-opacity: unset !important; stroke-width: unset !important; tab-size: unset !important; table-layout: unset !important; text-align: unset !important; text-align-last: unset !important; text-anchor: unset !important; text-box-edge: unset !important; text-box-trim: unset !important; text-decoration-color: unset !important; text-decoration: unset !important; text-decoration-skip-ink: unset !important; text-decoration-style: unset !important; text-decoration-thickness: unset !important; text-emphasis-color: unset !important; text-emphasis-position: unset !important; text-emphasis-style: unset !important; text-group-align: unset !important; text-indent: unset !important; text-justify: unset !important; text-overflow: unset !important; text-shadow: unset !important; text-transform: unset !important; text-underline-offset: unset !important; text-underline-position: unset !important; text-wrap: unset !important; touch-action: unset !important; transform: unset !important; transform-box: unset !important; transform-origin: unset !important; transform-style: unset !important; transition: unset !important; translate: unset !important; vector-effect: unset !important; vertical-align: unset !important; view-timeline: unset !important; view-transition-name: unset !important; white-space: unset !important; widows: unset !important; will-change: unset !important; word-break: unset !important; x: unset !important; y: unset !important; z-index: unset !important; -apple-color-filter: unset !important; -apple-pay-button-style: unset !important; -apple-pay-button-type: unset !important; -internal-text-autosizing-status: unset !important; border-spacing: unset !important; -webkit-box-align: unset !important; -webkit-box-decoration-break: unset !important; -webkit-box-direction: unset !important; -webkit-box-flex: unset !important; -webkit-box-flex-group: unset !important; -webkit-box-lines: unset !important; -webkit-box-ordinal-group: unset !important; -webkit-box-orient: unset !important; -webkit-box-pack: unset !important; -webkit-box-reflect: unset !important; -webkit-column-axis: unset !important; -webkit-column-progression: unset !important; -webkit-cursor-visibility: unset !important; -webkit-font-size-delta: unset !important; -webkit-hyphenate-limit-after: unset !important; -webkit-hyphenate-limit-before: unset !important; -webkit-hyphenate-limit-lines: unset !important; -webkit-initial-letter: unset !important; -webkit-line-align: unset !important; -webkit-line-box-contain: unset !important; -webkit-line-clamp: unset !important; -webkit-line-grid: unset !important; -webkit-line-snap: unset !important; -webkit-marquee-direction: unset !important; -webkit-marquee-increment: unset !important; -webkit-marquee-repetition: unset !important; -webkit-marquee-speed: unset !important; -webkit-marquee-style: unset !important; -webkit-nbsp-mode: unset !important; -webkit-rtl-ordering: unset !important; -webkit-text-decorations-in-effect: unset !important; -webkit-text-fill-color: unset !important; -webkit-text-security: unset !important; -webkit-text-stroke-color: unset !important; -webkit-text-stroke-width: unset !important; -webkit-user-drag: unset !important; -webkit-user-modify: unset !important; -webkit-user-select: unset !important; word-spacing: unset !important; backdrop-filter: unset !important; box-shadow: unset !important; mask-composite: unset !important; mask-mode: unset !important; text-combine-upright: unset !important; -webkit-backdrop-filter: unset !important; -webkit-background-clip: unset !important; -webkit-background-origin: unset !important; -webkit-box-shadow: unset !important; -webkit-mask: unset !important; -webkit-mask-composite: unset !important; -webkit-mask-source-type: unset !important; -webkit-text-combine: unset !important; display: block !important; visibility: unset !important; opacity: unset !important; block-size: unset !important; border-block: unset !important; border-radius: unset !important; border-end-end-radius: unset !important; border-end-start-radius: unset !important; border-inline: unset !important; border-start-end-radius: unset !important; border-start-start-radius: unset !important; inset: unset !important; contain-intrinsic-block-size: unset !important; contain-intrinsic-size: unset !important; contain-intrinsic-inline-size: unset !important; height: unset !important; inline-size: unset !important; inset-block: unset !important; inset-inline: unset !important; margin-block: unset !important; margin-inline: unset !important; max-block-size: unset !important; max-height: unset !important; max-inline-size: unset !important; min-block-size: unset !important; min-height: unset !important; min-inline-size: unset !important; min-width: unset !important; overscroll-behavior-block: unset !important; overscroll-behavior-inline: unset !important; overscroll-behavior: unset !important; padding-block: unset !important; padding: unset !important; padding-inline: unset !important; scroll-margin-block: unset !important; scroll-margin: unset !important; scroll-margin-inline: unset !important; scroll-padding-block: unset !important; scroll-padding: unset !important; scroll-padding-inline: unset !important; width: unset !important; margin: 0px 0px 1px !important; max-width: 600px !important;">
<div id="pfptBannerk8ad5io" style="color-scheme: unset !important; writing-mode: unset !important; -webkit-ruby-position: unset !important; font-family: Arial, sans-serif !important; font-feature-settings: unset !important; font-kerning: unset !important; font-optical-sizing: unset !important; font-palette: unset !important; font-size: 14px !important; font-size-adjust: unset !important; font-stretch: unset !important; font-style: unset !important; font-synthesis-small-caps: unset !important; font-synthesis-style: unset !important; font-synthesis-weight: unset !important; font-variant-alternates: unset !important; font-variant-caps: unset !important; font-variant-east-asian: unset !important; font-variant-ligatures: unset !important; font-variant-numeric: unset !important; font-variant-position: unset !important; font-variation-settings: unset !important; font-weight: bold !important; text-orientation: unset !important; text-rendering: unset !important; zoom: unset !important; -webkit-font-smoothing: unset !important; -webkit-locale: unset !important; -webkit-text-zoom: unset !important; letter-spacing: unset !important; accent-color: unset !important; align-content: unset !important; align-items: unset !important; align-self: unset !important; alignment-baseline: unset !important; alt: unset !important; animation-composition: unset !important; animation: unset !important; appearance: unset !important; aspect-ratio: unset !important; backface-visibility: unset !important; background-attachment: unset !important; background-blend-mode: unset !important; background-image: unset !important; background-position: unset !important; background-repeat: unset !important; background-size: unset !important; baseline-shift: unset !important; border-collapse: unset !important; border: unset !important; box-sizing: unset !important; break-after: unset !important; break-before: unset !important; break-inside: unset !important; buffered-rendering: unset !important; caption-side: unset !important; caret-color: unset !important; clear: unset !important; clip: unset !important; clip-path: unset !important; clip-rule: unset !important; color-interpolation: unset !important; color-interpolation-filters: unset !important; column-count: unset !important; column-fill: unset !important; column-gap: unset !important; column-rule-color: unset !important; column-rule-style: unset !important; column-rule-width: unset !important; column-span: unset !important; column-width: unset !important; contain: unset !important; container-name: unset !important; container-type: unset !important; content: unset !important; counter-increment: unset !important; counter-reset: unset !important; counter-set: unset !important; cursor: unset !important; cx: unset !important; cy: unset !important; dominant-baseline: unset !important; empty-cells: unset !important; fill: unset !important; fill-opacity: unset !important; fill-rule: unset !important; filter: unset !important; flex: unset !important; flex-flow: unset !important; float: unset !important; flood-color: unset !important; flood-opacity: unset !important; glyph-orientation-horizontal: unset !important; glyph-orientation-vertical: unset !important; grid: unset !important; grid-column-end: unset !important; grid-column-start: unset !important; grid-row-end: unset !important; grid-row-start: unset !important; hanging-punctuation: unset !important; hyphenate-character: unset !important; hyphens: unset !important; image-orientation: unset !important; image-rendering: unset !important; isolation: unset !important; justify-content: unset !important; justify-items: unset !important; justify-self: unset !important; kerning: unset !important; lighting-color: unset !important; line-break: unset !important; line-height: 18px !important; list-style: unset !important; margin-trim: unset !important; marker: unset !important; mask: unset !important; mask-type: unset !important; math-style: unset !important; mix-blend-mode: unset !important; object-fit: unset !important; object-position: unset !important; offset-anchor: unset !important; offset-distance: unset !important; offset-path: unset !important; offset-position: unset !important; offset-rotate: unset !important; order: unset !important; orphans: unset !important; outline: unset !important; outline-offset: unset !important; overflow-wrap: unset !important; overflow: unset !important; page: unset !important; paint-order: unset !important; perspective: unset !important; perspective-origin: unset !important; pointer-events: unset !important; position: unset !important; print-color-adjust: unset !important; quotes: unset !important; r: unset !important; resize: unset !important; rotate: unset !important; row-gap: unset !important; rx: unset !important; ry: unset !important; scale: unset !important; scroll-behavior: unset !important; scroll-snap-align: unset !important; scroll-snap-stop: unset !important; scroll-snap-type: unset !important; shape-image-threshold: unset !important; shape-margin: unset !important; shape-outside: unset !important; shape-rendering: unset !important; size: unset !important; speak-as: unset !important; stop-color: unset !important; stop-opacity: unset !important; stroke: unset !important; stroke-color: unset !important; stroke-dasharray: unset !important; stroke-dashoffset: unset !important; stroke-linecap: unset !important; stroke-linejoin: unset !important; stroke-miterlimit: unset !important; stroke-opacity: unset !important; stroke-width: unset !important; tab-size: unset !important; table-layout: unset !important; text-align: unset !important; text-align-last: unset !important; text-anchor: unset !important; text-decoration-color: unset !important; text-decoration: unset !important; text-decoration-skip-ink: unset !important; text-decoration-style: unset !important; text-decoration-thickness: unset !important; text-emphasis-color: unset !important; text-emphasis-position: unset !important; text-emphasis-style: unset !important; text-indent: unset !important; text-overflow: unset !important; text-shadow: unset !important; text-transform: unset !important; text-underline-offset: unset !important; text-underline-position: unset !important; text-wrap: unset !important; touch-action: unset !important; transform: unset !important; transform-box: unset !important; transform-origin: unset !important; transform-style: unset !important; transition: unset !important; translate: unset !important; vector-effect: unset !important; vertical-align: unset !important; white-space: unset !important; widows: unset !important; will-change: unset !important; word-break: unset !important; x: unset !important; y: unset !important; z-index: unset !important; -apple-color-filter: unset !important; -apple-pay-button-style: unset !important; -apple-pay-button-type: unset !important; border-spacing: unset !important; -webkit-box-align: unset !important; -webkit-box-decoration-break: unset !important; -webkit-box-direction: unset !important; -webkit-box-flex: unset !important; -webkit-box-flex-group: unset !important; -webkit-box-lines: unset !important; -webkit-box-ordinal-group: unset !important; -webkit-box-orient: unset !important; -webkit-box-pack: unset !important; -webkit-box-reflect: unset !important; -webkit-column-axis: unset !important; -webkit-column-progression: unset !important; -webkit-cursor-visibility: unset !important; -webkit-hyphenate-limit-after: unset !important; -webkit-hyphenate-limit-before: unset !important; -webkit-hyphenate-limit-lines: unset !important; -webkit-initial-letter: unset !important; -webkit-line-align: unset !important; -webkit-line-box-contain: unset !important; -webkit-line-clamp: unset !important; -webkit-line-grid: unset !important; -webkit-line-snap: unset !important; -webkit-nbsp-mode: unset !important; -webkit-rtl-ordering: unset !important; -webkit-text-decorations-in-effect: unset !important; -webkit-text-fill-color: unset !important; -webkit-text-security: unset !important; -webkit-text-stroke-color: unset !important; -webkit-text-stroke-width: unset !important; -webkit-user-drag: unset !important; -webkit-user-modify: unset !important; -webkit-user-select: unset !important; word-spacing: unset !important; background-clip: unset !important; background-origin: unset !important; box-shadow: unset !important; mask-composite: unset !important; mask-mode: unset !important; text-combine-upright: unset !important; -webkit-backdrop-filter: unset !important; -webkit-background-clip: unset !important; -webkit-background-origin: unset !important; -webkit-box-shadow: unset !important; mask-size: unset !important; -webkit-mask: unset !important; -webkit-mask-composite: unset !important; -webkit-mask-source-type: unset !important; -webkit-text-combine: unset !important; display: block !important; visibility: visible !important; opacity: unset !important; background-color: rgb(208, 216, 220) !important; block-size: unset !important; border-block: unset !important; border-radius: unset !important; border-end-end-radius: unset !important; border-end-start-radius: unset !important; border-inline: unset !important; border-start-end-radius: unset !important; border-start-start-radius: unset !important; inset: unset !important; contain-intrinsic-block-size: unset !important; contain-intrinsic-size: unset !important; contain-intrinsic-inline-size: unset !important; height: unset !important; inline-size: unset !important; inset-block: unset !important; inset-inline: unset !important; margin-block: unset !important; margin: unset !important; margin-inline: unset !important; max-block-size: unset !important; max-height: unset !important; max-inline-size: unset !important; max-width: unset !important; min-block-size: unset !important; min-height: unset !important; min-inline-size: unset !important; min-width: unset !important; overscroll-behavior-block: unset !important; overscroll-behavior-inline: unset !important; overscroll-behavior: unset !important; padding-block: unset !important; padding: unset !important; padding-inline: unset !important; scroll-margin-block: unset !important; scroll-margin: unset !important; scroll-margin-inline: unset !important; scroll-padding-block: unset !important; scroll-padding: unset !important; scroll-padding-inline: unset !important; width: unset !important;">This
Message Is From an External Sender</div>
<div id="pfptBannerk8ad5io" style="color-scheme: unset !important; writing-mode: unset !important; -webkit-ruby-position: unset !important; font-family: Arial, sans-serif !important; font-feature-settings: unset !important; font-kerning: unset !important; font-optical-sizing: unset !important; font-palette: unset !important; font-size: 12px !important; font-size-adjust: unset !important; font-stretch: unset !important; font-style: unset !important; font-synthesis-small-caps: unset !important; font-synthesis-style: unset !important; font-synthesis-weight: unset !important; font-variant-alternates: unset !important; font-variant-caps: unset !important; font-variant-east-asian: unset !important; font-variant-ligatures: unset !important; font-variant-numeric: unset !important; font-variant-position: unset !important; font-variation-settings: unset !important; font-weight: unset !important; text-orientation: unset !important; text-rendering: unset !important; zoom: unset !important; -webkit-font-smoothing: unset !important; -webkit-locale: unset !important; -webkit-text-zoom: unset !important; letter-spacing: unset !important; accent-color: unset !important; align-content: unset !important; align-items: unset !important; align-self: unset !important; alignment-baseline: unset !important; alt: unset !important; animation-composition: unset !important; animation: unset !important; appearance: unset !important; aspect-ratio: unset !important; backface-visibility: unset !important; background-attachment: unset !important; background-blend-mode: unset !important; background-image: unset !important; background-position: unset !important; background-repeat: unset !important; background-size: unset !important; baseline-shift: unset !important; border-collapse: unset !important; border: unset !important; box-sizing: unset !important; break-after: unset !important; break-before: unset !important; break-inside: unset !important; buffered-rendering: unset !important; caption-side: unset !important; caret-color: unset !important; clear: unset !important; clip: unset !important; clip-path: unset !important; clip-rule: unset !important; color-interpolation: unset !important; color-interpolation-filters: unset !important; column-count: unset !important; column-fill: unset !important; column-gap: unset !important; column-rule-color: unset !important; column-rule-style: unset !important; column-rule-width: unset !important; column-span: unset !important; column-width: unset !important; contain: unset !important; container-name: unset !important; container-type: unset !important; content: unset !important; counter-increment: unset !important; counter-reset: unset !important; counter-set: unset !important; cursor: unset !important; cx: unset !important; cy: unset !important; dominant-baseline: unset !important; empty-cells: unset !important; fill: unset !important; fill-opacity: unset !important; fill-rule: unset !important; filter: unset !important; flex: unset !important; flex-flow: unset !important; float: unset !important; flood-color: unset !important; flood-opacity: unset !important; glyph-orientation-horizontal: unset !important; glyph-orientation-vertical: unset !important; grid: unset !important; grid-column-end: unset !important; grid-column-start: unset !important; grid-row-end: unset !important; grid-row-start: unset !important; hanging-punctuation: unset !important; hyphenate-character: unset !important; hyphens: unset !important; image-orientation: unset !important; image-rendering: unset !important; isolation: unset !important; justify-content: unset !important; justify-items: unset !important; justify-self: unset !important; kerning: unset !important; lighting-color: unset !important; line-break: unset !important; line-height: 18px !important; list-style: unset !important; margin-trim: unset !important; marker: unset !important; mask: unset !important; mask-type: unset !important; math-style: unset !important; mix-blend-mode: unset !important; object-fit: unset !important; object-position: unset !important; offset-anchor: unset !important; offset-distance: unset !important; offset-path: unset !important; offset-position: unset !important; offset-rotate: unset !important; order: unset !important; orphans: unset !important; outline: unset !important; outline-offset: unset !important; overflow-wrap: unset !important; overflow: unset !important; page: unset !important; paint-order: unset !important; perspective: unset !important; perspective-origin: unset !important; pointer-events: unset !important; position: unset !important; print-color-adjust: unset !important; quotes: unset !important; r: unset !important; resize: unset !important; rotate: unset !important; row-gap: unset !important; rx: unset !important; ry: unset !important; scale: unset !important; scroll-behavior: unset !important; scroll-snap-align: unset !important; scroll-snap-stop: unset !important; scroll-snap-type: unset !important; shape-image-threshold: unset !important; shape-margin: unset !important; shape-outside: unset !important; shape-rendering: unset !important; size: unset !important; speak-as: unset !important; stop-color: unset !important; stop-opacity: unset !important; stroke: unset !important; stroke-color: unset !important; stroke-dasharray: unset !important; stroke-dashoffset: unset !important; stroke-linecap: unset !important; stroke-linejoin: unset !important; stroke-miterlimit: unset !important; stroke-opacity: unset !important; stroke-width: unset !important; tab-size: unset !important; table-layout: unset !important; text-align: unset !important; text-align-last: unset !important; text-anchor: unset !important; text-decoration-color: unset !important; text-decoration: unset !important; text-decoration-skip-ink: unset !important; text-decoration-style: unset !important; text-decoration-thickness: unset !important; text-emphasis-color: unset !important; text-emphasis-position: unset !important; text-emphasis-style: unset !important; text-indent: unset !important; text-overflow: unset !important; text-shadow: unset !important; text-transform: unset !important; text-underline-offset: unset !important; text-underline-position: unset !important; text-wrap: unset !important; touch-action: unset !important; transform: unset !important; transform-box: unset !important; transform-origin: unset !important; transform-style: unset !important; transition: unset !important; translate: unset !important; vector-effect: unset !important; vertical-align: unset !important; white-space: unset !important; widows: unset !important; will-change: unset !important; word-break: unset !important; x: unset !important; y: unset !important; z-index: unset !important; -apple-color-filter: unset !important; -apple-pay-button-style: unset !important; -apple-pay-button-type: unset !important; border-spacing: unset !important; -webkit-box-align: unset !important; -webkit-box-decoration-break: unset !important; -webkit-box-direction: unset !important; -webkit-box-flex: unset !important; -webkit-box-flex-group: unset !important; -webkit-box-lines: unset !important; -webkit-box-ordinal-group: unset !important; -webkit-box-orient: unset !important; -webkit-box-pack: unset !important; -webkit-box-reflect: unset !important; -webkit-column-axis: unset !important; -webkit-column-progression: unset !important; -webkit-cursor-visibility: unset !important; -webkit-hyphenate-limit-after: unset !important; -webkit-hyphenate-limit-before: unset !important; -webkit-hyphenate-limit-lines: unset !important; -webkit-initial-letter: unset !important; -webkit-line-align: unset !important; -webkit-line-box-contain: unset !important; -webkit-line-clamp: unset !important; -webkit-line-grid: unset !important; -webkit-line-snap: unset !important; -webkit-nbsp-mode: unset !important; -webkit-rtl-ordering: unset !important; -webkit-text-decorations-in-effect: unset !important; -webkit-text-fill-color: unset !important; -webkit-text-security: unset !important; -webkit-text-stroke-color: unset !important; -webkit-text-stroke-width: unset !important; -webkit-user-drag: unset !important; -webkit-user-modify: unset !important; -webkit-user-select: unset !important; word-spacing: unset !important; background-clip: unset !important; background-origin: unset !important; box-shadow: unset !important; mask-composite: unset !important; mask-mode: unset !important; text-combine-upright: unset !important; -webkit-backdrop-filter: unset !important; -webkit-background-clip: unset !important; -webkit-background-origin: unset !important; -webkit-box-shadow: unset !important; mask-size: unset !important; -webkit-mask: unset !important; -webkit-mask-composite: unset !important; -webkit-mask-source-type: unset !important; -webkit-text-combine: unset !important; display: block !important; visibility: visible !important; opacity: unset !important; background-color: rgb(208, 216, 220) !important; block-size: unset !important; border-block: unset !important; border-radius: unset !important; border-end-end-radius: unset !important; border-end-start-radius: unset !important; border-inline: unset !important; border-start-end-radius: unset !important; border-start-start-radius: unset !important; inset: unset !important; contain-intrinsic-block-size: unset !important; contain-intrinsic-size: unset !important; contain-intrinsic-inline-size: unset !important; height: unset !important; inline-size: unset !important; inset-block: unset !important; inset-inline: unset !important; margin-block: unset !important; margin-bottom: unset !important; margin-inline: unset !important; margin-left: unset !important; margin-right: unset !important; max-block-size: unset !important; max-height: unset !important; max-inline-size: unset !important; max-width: unset !important; min-block-size: unset !important; min-height: unset !important; min-inline-size: unset !important; min-width: unset !important; overscroll-behavior-block: unset !important; overscroll-behavior-inline: unset !important; overscroll-behavior: unset !important; padding-block: unset !important; padding: unset !important; padding-inline: unset !important; scroll-margin-block: unset !important; scroll-margin: unset !important; scroll-margin-inline: unset !important; scroll-padding-block: unset !important; scroll-padding: unset !important; scroll-padding-inline: unset !important; width: unset !important; margin-top: 2px !important;">This
message came from outside your
organization.</div>
</div>
</div>
<pre style="caret-color: rgb(0, 0, 0); font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: sans-serif; white-space: pre-wrap; overflow-wrap: break-word;">hi,
I have a Jacobian matrix created using DMCreateMatrix(). What would be
the best way to add extra nonzero entries into it?
I'm guessing that DMCreateMatrix() allocates the storage so the nonzero
structure can't really be easily modified. Would it be a case of
creating a new matrix, copying the nonzero entries from the original one
and then adding the extra ones, before calling MatSetUp() or similar? If
so, how exactly would you copy the nonzero structure from the original
matrix?
Background: the flow problem I'm solving (on a DMPlex with finite volume
method) has complex source terms that depend on the solution (e.g.
pressure), and can also depend on other source terms. A simple example
is when fluid is extracted from one location, with a pressure-dependent
flow rate, and some of it is then reinjected in another location. This
can result in poor nonlinear solver convergence. I think the reason is
that there are effectively missing Jacobian entries in the row for the
reinjection cell, which should have an additional dependence on the
solution in the cell where fluid is extracted.
- Adrian
--
Dr Adrian Croucher
Senior Research Fellow
Department of Engineering Science
Waipapa Taumata Rau / University of Auckland, New Zealand
email: <a href="mailto:a.croucher@auckland.ac.nz" moz-do-not-send="true" class="moz-txt-link-freetext">a.croucher@auckland.ac.nz</a>
tel: +64 (0)9 923 4611
</pre>
<br class="Apple-interchange-newline">
</div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
Dr Adrian Croucher
Senior Research Fellow
Department of Engineering Science
Waipapa Taumata Rau / University of Auckland, New Zealand
email: <a class="moz-txt-link-abbreviated moz-txt-link-freetext" href="mailto:a.croucher@auckland.ac.nz" moz-do-not-send="true">a.croucher@auckland.ac.nz</a>
tel: +64 (0)9 923 4611</pre>
</div>
<span id="cid:5C5BDD81-E016-4C86-A345-FBE276CEAD22"><3x3grid.exo></span><span id="cid:E2D65CD8-6EFF-4063-A2F0-2CC0FD711C52"><matmodify.F90></span></div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
Dr Adrian Croucher
Senior Research Fellow
Department of Engineering Science
Waipapa Taumata Rau / University of Auckland, New Zealand
email: <a class="moz-txt-link-abbreviated" href="mailto:a.croucher@auckland.ac.nz">a.croucher@auckland.ac.nz</a>
tel: +64 (0)9 923 4611</pre>
</body>
</html>