[petsc-users] which solver should i use to solve a dense matrix occured from spectral method

Hong hzhang at mcs.anl.gov
Wed Apr 13 10:03:53 CDT 2016

丁老师 :

> Dear friends:
>      the matrix from spectral method is a dense matrix, and some entries
> at diagonal may have a zero value.
> which solver and preconditioner should i use to solve it.
For dense matrix, you should use dense matrix format. LU/Cholesky
preconditioner are provided by Lapack or Elemental. Petsc supports
interface to these packages.


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