does lapack support the oversized matrix?

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does lapack support the oversized matrix?

Postby caiye1231 » Fri Nov 05, 2010 10:55 am

i will solve the problem Ax=b, A maybe is a 1e4*1e4 sparse matrix. does lapack can solve this problem? Tanks for any help.
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Re: does lapack support the oversized matrix?

Postby indochinaguide » Thu Aug 02, 2012 10:03 pm

I have the same problem. Hope to have the response soon
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Re: does lapack support the oversized matrix?

Postby admin » Thu Aug 02, 2012 10:37 pm

LAPACK is for dense and banded matrices.

You probably need to turn to iterative methods package.
If the matrix is symmetric or Hermitian, check out PRIMME or BLOPEX.
If the matrix is nonsymmetric, checkout ARPACK.
You have some larger software like Trilinos or Petsc that might be worth checking out.
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Re: does lapack support the oversized matrix?

Postby Julien Langou » Fri Aug 03, 2012 12:41 am

10,000x10,000 is no problem for LAPACK. As mentioned by Julie, LAPACK is meant for dense (or banded) matrices so of course if your matrix is sparse you would better be off with a sparse direct package. J.
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