On Sat, Mar 6, 2010 at 11:49 PM, David sheehan <span dir="ltr"><<a href="mailto:david.sheehanjr@gmail.com">david.sheehanjr@gmail.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div>Hi, <br>I need your helps about PETSC as follows:<br>1) how can I call boomerAMG of HYPRE through PETSC as a solver and a preconditioner?<br></div></blockquote><div><br></div><div>First, configure with Hypre . Then -pc_type hypre -pc_hypre_type boomeramg</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div>2) how can I make a precondioner from B matrix, but apply the preconditioner to Ax=b in PETSC? <br>
Thanks in advance.</div></blockquote><div><br></div><div>I cannot understand exactly what you mean. However, if you want to create a PC based upon a matrix</div><div>which is not the system matrix A, you can specify it in KSPSetOperators().</div>
<div><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;"><font color="#888888">
<div>David</div></font></blockquote></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<br>