[petsc-users] about pclu

[Jed Brown]

On Thu, Apr 7, 2011 at 16:21, Ryan Yan <vyan2000 at gmail.com> wrote:

> Wait, so is it for PREONLY? And what Matsolve does, solving a triangular
> system with both L and U available?
>

Yup, forward- and back-solves are both done in one "MatSolve".


> The reason that I previously guess the count be two is that I think there
> is a back-substituiton
> and a forward-substitution involved in solving a linear system using
> factorization. If a pair of
> back-substitution and forward-substitution counts 1 MatSolve. Then I think
> we mean the same thing.
>
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