[petsc-users] about Singular value

[Matthew Knepley]

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
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