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

丁老师 ztdepyahoo at 163.com
Wed Apr 13 00:38:37 CDT 2016

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.
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