MATSOLVERBAS

Provides ICC(k) with drop tolerance Works with MATAIJ matrices

Options Database Keys

-pc_factor_levels <l> - number of levels of fill
-pc_factor_drop_tolerance - is not currently hooked up to do anything

Level: intermediate

Contributed by: Bas van 't Hof

Notes

Since this currently hooked up to use drop tolerance it should produce the same factors and hence convergence as the PETSc ICC, for higher levels of fill it does not. This needs to be investigated. Unless you are interested in drop tolerance ICC and willing to work through the code we recommend not using this functionality.

See Also

PCFactorSetMatSolverType(), MatSolverType, PCFactorSetLevels(), PCFactorSetDropTolerance()

Location:spbas.c