But does it require a positive definite preconditioner?
Barry
On Feb 28, 2008, at 9:32 AM, Matthew Knepley wrote:
> Docs are wrong.
>
> Matt
>
> 2008/2/28 Lisandro Dalcin <dalcinl at gmail.com>:
>> I've noticed that the docs for MINRES say that the operator and the
>> preconditioner must be POSITIVE DEFINITE. But I understand MINRES is
>> tailored for the symmetric/hermitian-indefinite case.
>>
>> Are the docs wrong? Or the actual code is a (very peculiar) MINRES
>> variant?
>>
>>
>> --
>> Lisandro Dalc?n
>> ---------------
>> Centro Internacional de M?todos Computacionales en Ingenier?a (CIMEC)
>> Instituto de Desarrollo Tecnol?gico para la Industria Qu?mica (INTEC)
>> Consejo Nacional de Investigaciones Cient?ficas y T?cnicas (CONICET)
>> PTLC - G?emes 3450, (3000) Santa Fe, Argentina
>> Tel/Fax: +54-(0)342-451.1594
>>
>>
>
>
>
> --
> 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
>
