On Wed, Aug 8, 2018 at 3:51 AM, Barna Becsek <barnabec...@gmail.com> wrote:
> Hello, > > is there a way to compute a SparseMatrix’s determinant? I would like to > solve a linear system but my final residual always equals exactly 0 after > just one iteration (where the solve terminates). Hence, I would like to > check the matrix for singularity. > If you are using PETSc, for a small enough problem you could run with the "-pc_type svd -pc_svd_monitor" command line options and look at the singular values. If any of them are zero or nearly zero, the system is singular. -- John ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
