<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><div>Would the same work for non-structured problems, for instance for power flow equations? <br></div><div><br></div><div>Thx. Domenico Lahaye. <br></div><div id="yui_3_16_0_1_1435131030713_3419"><span></span></div><br> <div id="yui_3_16_0_1_1435131030713_3418" style="font-family: times new roman, new york, times, serif; font-size: 16px;"> <div id="yui_3_16_0_1_1435131030713_3417" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_1_1435131030713_3416" dir="ltr"> <hr size="1"> <font id="yui_3_16_0_1_1435131030713_3415" face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> Matthew Knepley <knepley@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> Gideon Simpson <gideon.simpson@gmail.com> <br><b><span style="font-weight: bold;">Cc:</span></b> petsc-users <petsc-users@mcs.anl.gov> <br> <b id="yui_3_16_0_1_1435131030713_3445"><span id="yui_3_16_0_1_1435131030713_3444" style="font-weight: bold;">Sent:</span></b> Wednesday, June 24, 2015 5:05 AM<br> <b id="yui_3_16_0_1_1435131030713_3447"><span id="yui_3_16_0_1_1435131030713_3446" style="font-weight: bold;">Subject:</span></b> Re: [petsc-users] jacobians for multicomponent problems<br> </font> </div> <div id="yui_3_16_0_1_1435131030713_3448" class="y_msg_container"><br><div id="yiv7341974345"><div id="yui_3_16_0_1_1435131030713_3452"><div id="yui_3_16_0_1_1435131030713_3451" dir="ltr"><div id="yui_3_16_0_1_1435131030713_3450" class="yiv7341974345gmail_extra"><div id="yui_3_16_0_1_1435131030713_3449" class="yiv7341974345gmail_quote">On Tue, Jun 23, 2015 at 7:52 PM, Gideon Simpson <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:gideon.simpson@gmail.com" target="_blank" href="mailto:gideon.simpson@gmail.com">gideon.simpson@gmail.com</a>></span> wrote:<br clear="none"><blockquote class="yiv7341974345gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div style="word-wrap:break-word;">Suppose I have a problem for which the field variable has multiple components, in this case real and imaginary parts, and I have created a DM with two degrees of freedom. When assembling a Jacobian associated with a nonlinear problem on this data, is there any data management accounting for the different components that makes this “easier?”</div></blockquote><div><br clear="none"></div><div>DMDA knows about components so that MatStencil has a .c slot for indices. Is that what you mean?</div><div><br clear="none"></div><div> Thanks,</div><div><br clear="none"></div><div> Matt</div><div class="qtdSeparateBR"><br><br></div><div class="yiv7341974345yqt5476409555" id="yiv7341974345yqtfd43439"><div> </div></div><blockquote class="yiv7341974345gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div style="word-wrap:break-word;"><div class="yiv7341974345yqt5476409555" id="yiv7341974345yqtfd81022"><span class="yiv7341974345HOEnZb"><font color="#888888"></font></span></div><div><div><div class="yiv7341974345yqt5476409555" id="yiv7341974345yqtfd03803">
<span style="border-collapse:separate;color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;">-gideon</span></div>
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<br clear="none"></div></div></blockquote></div><br clear="none"><br clear="all"><div><br clear="none"></div>-- <br clear="none"><div class="yiv7341974345gmail_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 clear="none">-- Norbert Wiener</div><div class="yiv7341974345yqt5476409555" id="yiv7341974345yqtfd34203">
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