Can you guys comment on what example case would be best to start off for shell <div>operators with FieldSplit? The examples I am looking into all start with creating native </div><div>PETSc matrices and vectors. </div><div>
<br></div><div>If possible could you write down steps that would be needed in setting such system...</div><div><br></div><div>a) Create matrices using XXXX (?) b) Create vectors using YYYY ....<br><br><div class="gmail_quote">
On Thu, Feb 21, 2013 at 3:24 PM, Matthew Knepley <span dir="ltr"><<a href="mailto:knepley@gmail.com" target="_blank">knepley@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div><div class="h5">On Thu, Feb 21, 2013 at 4:20 PM, Amneet Bhalla <span dir="ltr"><<a href="mailto:mail2amneet@gmail.com" target="_blank">mail2amneet@gmail.com</a>></span> wrote:<br></div></div><div class="gmail_extra">
<div class="gmail_quote"><div><div class="h5">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br><div class="gmail_quote">On Thu, Feb 21, 2013 at 2:57 PM, Jed Brown <span dir="ltr"><<a href="mailto:jedbrown@mcs.anl.gov" target="_blank">jedbrown@mcs.anl.gov</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
that you're happy with and that performs well with fieldsplit or custom preconditioning that will be amenable to your MatShells</blockquote></div><br>Is fieldsplit an alternative approach to MatNest and VecNest? The problem is that I am working on nonnative PETSc<div>
data; so I am not sure which recent methods would support shell approach. All I want is to use PETSc's algorithm </div><div>for solving multicomponent system of equation. I am not bothering about preconditioning yet, as I will be trying</div>
<div>a custom preconditioner down the road. </div></blockquote><div><br></div></div></div><div>MatNest is just an optimization matrix format. Get your stuff working with FieldSplit and then think about optimization.</div>
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<br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><span><font color="#888888"><br><span class="HOEnZb"><font color="#888888">-- <br>
<div>Amneet <br>
<br></div><div><br></div><div><br></div>
</font></span></font></span></div><span class="HOEnZb"><font color="#888888">
</font></span></blockquote></div><span class="HOEnZb"><font color="#888888"><br><br clear="all"><div><br></div>-- <br>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
</font></span></div></div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div>Amneet <br><br></div><div><br></div><div><br></div>
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