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Re: whether do I need to consider the symmetric preconditioner when using CG?
- To: petsc-users@xxxxxxxxxxx
- Subject: Re: whether do I need to consider the symmetric preconditioner when using CG?
- From: "Lisandro Dalcin" <dalcinl@xxxxxxxxx>
- Date: Wed, 16 Jan 2008 13:20:03 -0300
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KSPCG only supports left preconditioning.
On 1/16/08, Yujie <recrusader@xxxxxxxxx> wrote:
> hi, everyone
>
> I know there are three types of preconditioners, that is left, split and
> right preconditioners? When I use CG method in PETSc, whether do I need to
> consider select one type of preconditioner? Whether do different types
> affect the performance of preconditioned CG? thanks a lot.
>
> Regards,
> Yujie
>
--
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
PTLC - Güemes 3450, (3000) Santa Fe, Argentina
Tel/Fax: +54-(0)342-451.1594