On Sun, Jul 22, 2012 at 2:51 PM, Mengda Wu <wumengda at gmail.com> wrote:
> Hi all, > > How should I use Petsc to solve a sparse under-determined system? > Basically, I need a quick solution to solve > Ax=b, where is A is a sparse (possibly nonsymmetric) matrix of size m x n, > where m<n. The solution I need to find is to minimize |x|^2. > > I know SPQR(http://www.cise.ufl.edu/research/sparse/SPQR/) can do > this. But if Petsc has some functions or > wrappers, it will be great to stick with Petsc. > Have you tried LSQR, SYMMLQ, or CGNE? Matt > Thanks, > Mengda > -- 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120722/cad1aa18/attachment.html>
