<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div><span>RCM did not help much for my case. This case represents some strong <span id="misspell-1">connectivities</span> in channels. I am wondering if PETSc has some reordering algorithm or solver that is not based on connectivity graph, but is based on <span id="misspell-3">connectivity</span> strength (such as percolation type of reordering). Any information is appreciated.</span></div><div><span></span> </div><div><span>Thanks,</span></div><div><span>Qin</span></div><div style="display: block;" class="yahoo_quoted"> <br> <br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr">
<font size="2" face="Arial"> On Friday, February 14, 2014 1:30 PM, Qin Lu <lu_qin_2000@yahoo.com> wrote:<br> </font> </div> <div class="y_msg_container"><div id="yiv6197117143"><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);"><div><span>Thanks a lot!</span></div><div><span></span> </div><div><span>Qin</span></div><div id="yiv6197117143yqt21705" class="yiv6197117143yqt2652612063"><div style="display: block;" class="yiv6197117143yahoo_quoted"> <br clear="none"> <br clear="none"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> On Friday, February 14, 2014 11:16 AM, Jed Brown
<jed@jedbrown.org> wrote:<br clear="none"> </font> </div> <div class="yiv6197117143y_msg_container">Qin Lu <<a href="mailto:lu_qin_2000@yahoo.com" shape="rect" rel="nofollow" target="_blank" ymailto="mailto:lu_qin_2000@yahoo.com">lu_qin_2000@yahoo.com</a>> writes:<div id="yiv6197117143yqtfd64902" class="yiv6197117143yqt0622467411"><br clear="none"><br clear="none">> Barry and
Jed,<br clear="none">> <br clear="none">> Nice to know that! Is there a corresponding function call to set RCM?</div><br clear="none"><br clear="none">$ ./ex2 -pc_factor_mat_ordering_type rcm -help | grep -A1 mat_ordering<br clear="none"> -pc_factor_mat_ordering_type <natural>: Reordering to reduce nonzeros in factored matrix (one of) natural nd 1wd rcm qmd rowlength wbm spectral<br clear="none"> (PCFactorSetMatOrderingType)<br clear="none"><br clear="none">Looks like you should check out<br clear="none"><br clear="none"><a href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCFactorSetMatOrderingType.html" shape="rect" rel="nofollow" target="_blank">http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCFactorSetMatOrderingType.html</a><div id="yiv6197117143yqtfd92708" class="yiv6197117143yqt0622467411"><br clear="none"></div><br clear="none"><br clear="none"></div> </div> </div>
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