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
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.