[petsc-users] Solving upper triangular system with pc fieldsplit

[Thomas Witkowski]

Am 20.08.2012 13:39, schrieb Matthew Knepley:
> On Mon, Aug 20, 2012 at 3:09 AM, Thomas Witkowski 
> <thomas.witkowski at tu-dresden.de 
> <mailto:thomas.witkowski at tu-dresden.de>> wrote:
>
>     Is it possible to change the PCFIELDSPLIT / block Gauss-Seidel
>     preconditioner to use A_01 instead of A_10 to solve an upper
>     triangular system?
>
>
> It always uses A_01. What exactly do you want to do?
In this case the documentation should be changed (see p. 86)

Thomas

>
>    Matt
>
>
>     Thomas
>
>
>
>
> -- 
> 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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