On Wed, Jun 22, 2011 at 17:44, Pierre-Yves Aquilanti <sperif at gmail.com>wrote:
> i'm trying to use the KSPLSQR solver in order to solve the Ax=b where b and > x are of size "n" and matrix A is of size "n+1 x n". > Shouldn't the right hand side vector have length n+1? > A is in fact a superior hessenberg matrix > Is your "real" system small and dense, or is this a model for some large system? In the small dense case, the natural thing is to use a direct solver, e.g. with Lapack. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110622/e9152196/attachment.htm>
