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Thank you, Matt!</div>
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<b>From: </b>Matthew Knepley <knepley@gmail.com><br>
<b>Date: </b>Thursday, November 13, 2025 at 1:28 PM<br>
<b>To: </b>Xu, Donghui <donghui.xu@pnnl.gov><br>
<b>Cc: </b>petsc-users@mcs.anl.gov <petsc-users@mcs.anl.gov><br>
<b>Subject: </b>Re: [petsc-users] How to map global vector to natural vector<br>
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Check twice before you click! This email originated from outside PNNL.</div>
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<div dir="ltr" class="ms-outlook-mobile-reference-message skipProofing">Here is the MR:
<a href="https://urldefense.us/v3/__https://gitlab.com/petsc/petsc/-/merge_requests/8845__;!!G_uCfscf7eWS!eigadZs4YANflOBAegy-QTp9ga_gDR04kBT3z1MTqB-hieojq_WyFnV_8kjEYFw4cGI5ugeoekJUtEVOobw-94jwWXM$" originalsrc="https://gitlab.com/petsc/petsc/-/merge_requests/8845">
https://gitlab.com/petsc/petsc/-/merge_requests/8845</a></div>
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<div dir="ltr" class="ms-outlook-mobile-reference-message skipProofing"> Thanks,</div>
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<div dir="ltr" class="ms-outlook-mobile-reference-message skipProofing"> Matt</div>
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<div dir="ltr" class="gmail_attr">On Tue, Oct 21, 2025 at 4:24 PM Matthew Knepley <<a href="mailto:knepley@gmail.com">knepley@gmail.com</a>> wrote:</div>
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<div dir="ltr" class="gmail_quote">I will fix it.</div>
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<div dir="ltr" class="gmail_quote">Thanks,</div>
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<div dir="ltr" class="gmail_quote"> Matt</div>
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<div dir="ltr" class="gmail_attr">On Tue, Oct 21, 2025 at 12:09 PM Xu, Donghui via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>> wrote:</div>
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Dear PETSc Team,</div>
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I am working with petsc4py for my model. I had some experience of using PETSc in Fortran. In Fortran, I used the following subroutines:</div>
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call DMPlexCreateNaturalVector(dm, natural, ierr)</div>
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call DMPlexNaturalToGlobalBegin(dm,natural,X,ierr)<br>
call DMPlexNaturalToGlobalEnd(dm,natural,X,ierr)</div>
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However, I found there are no such interfaces in petsc4py. Can you advise me on how to get the global vector in natural order with DMPLEX in petsc4py?</div>
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Thanks,</div>
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Donghui</div>
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<div class="gmail_quote">--</div>
<div dir="ltr" class="gmail_signature">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener</div>
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<div dir="ltr" class="gmail_signature"><a href="https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!eigadZs4YANflOBAegy-QTp9ga_gDR04kBT3z1MTqB-hieojq_WyFnV_8kjEYFw4cGI5ugeoekJUtEVOobw-hCsLqdY$" target="_blank" originalsrc="http://www.cse.buffalo.edu/~knepley/">https://www.cse.buffalo.edu/~knepley/</a></div>
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<div class="ms-outlook-mobile-reference-message skipProofing">--</div>
<div dir="ltr" class="gmail_signature">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener</div>
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<div dir="ltr" class="gmail_signature"><a href="https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!eigadZs4YANflOBAegy-QTp9ga_gDR04kBT3z1MTqB-hieojq_WyFnV_8kjEYFw4cGI5ugeoekJUtEVOobw-hCsLqdY$" target="_blank" originalsrc="http://www.cse.buffalo.edu/~knepley/">https://www.cse.buffalo.edu/~knepley/</a></div>
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