On Wed, Dec 14, 2011 at 8:04 AM, M.Younas <span dir="ltr"><<a href="mailto:m.younas@rug.nl">m.younas@rug.nl</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">
Hi, PETSc, Team,<br><br>I have
solved a non-symmetric Poisson problem using GMRES(m) as solver and
BoomerAMG (from Hypre) as preconditioner. But I don't understand how the
BoomerAMG works as preconditioner with GMRES(m). Can anyone explain the
procedure? Does it work like BoomerAMG precondition the liner system
first (once only) and then GMRES(m) is being used for stopping
criterion?<br></blockquote><div><br></div><div>Please see Yousef Saad's book on Iterative Solution of Linear Systems. Its available on his homepage.</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">
Kind regards,<br><br>Younas<br><br>RUG, Groningen, The Netherlands.
</blockquote></div><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<br>