On Sun, Oct 30, 2011 at 11:24 AM, behzad baghapour < behzad.baghapour at gmail.com> wrote:
> Then it would be an approximation to the Preconditioned Matrix (JM^(-1) or > M^(-1)J) up to the dimension of the Krylov subspace? Yes. Matt > On Sun, Oct 30, 2011 at 2:47 PM, Matthew Knepley <knepley at gmail.com>wrote: > >> On Sun, Oct 30, 2011 at 7:49 AM, behzad baghapour < >> behzad.baghapour at gmail.com> wrote: >> >>> Dear all, >>> >>> What is the procedure or method to calculate Extreme Singular Values >>> when calling KSPComputeExtremeSingularValues( )? >>> >> >> Are you asking what is done internally? We call LAPACK SVD on the >> Hermitian matrix made by the Krylov method. >> >> Matt >> >> >>> Thanks, B. B. >>> >> >> -- >> What most experimenters take for granted before they begin their >> experiments is infinitely more interesting than any results to which their >> experiments lead. >> -- Norbert Wiener >> > > > > -- > ================================== > Behzad Baghapour > Ph.D. Candidate, Mechecanical Engineering > University of Tehran, Tehran, Iran > https://sites.google.com/site/behzadbaghapour > Fax: 0098-21-88020741 > ================================== > > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20111030/f93e6a7a/attachment.htm>
