Bill Allombert on Fri, 20 Apr 2012 11:02:44 +0200

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Re: LU factorization for sparse matrices

On Thu, Apr 19, 2012 at 12:01:48PM +0200, Sara Costa Romero wrote:
> Hi
> I have some huge non-symmetric sparse systems I have to solve. Is there any
> LU factorization of sparse matrices or I have to consider them as dense? If
> there is not, can anyone give me an idea to minimize their fill factor
> preserving stability? It seems that if I preordering and stability do not
> match, one distrois the goods of the other.

Unfortunately PARI/GP does not provide efficient sparse linear algebra.
You shuld be better off using some other system like linbox or MUMPS.