[petsc-users] about pclu

[Ryan Yan]

It is wonderful to reach a agreement. :-)
Cheers,

Yan

On Thu, Apr 7, 2011 at 10:23 AM, Jed Brown <jed at 59a2.org> wrote:

> 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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