Re: how to inverse a sparse matrix in Petsc?

[Barry Smith <bsmith@xxxxxxxxxxx>]

   Yes. It uses the LU factorization of the matrix computed with  
MatLUFactor().

   Barry

On Feb 4, 2008, at 7:49 AM, li pan wrote:

> hi,
> Does MatMatSolve() use Gauss elimination method?
>
> thanx
>
> pan
>
>
> --- Barry Smith <bsmith@xxxxxxxxxxx> wrote:
>
> >    For sequential AIJ matrices you can fill the B
> > matrix with the
> > identity and then use
> > MatMatSolve().
> >
> >    Note since the inverse of a sparse matrix is
> > dense the B matrix is
> > a SeqDense matrix.
> >
> >    Barry
> >
> > On Feb 4, 2008, at 12:37 AM, Yujie wrote:
> >
> > > Hi,
> > > Now, I want to inverse a sparse matrix. I have
> > browsed the manual,
> > > however, I can't find some information. could you
> > give me some advice?
> > > thanks a lot.
> > >
> > > Regards,
> > > Yujie
>
>
>
>       
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