|-pc_factor_levels <k>||- number of levels of fill for ICC(k)|
|-pc_factor_in_place||- only for ICC(0) with natural ordering, reuses the space of the matrix for its factorization (overwrites original matrix)|
|-pc_factor_fill <nfill>||- expected amount of fill in factored matrix compared to original matrix, nfill > 1|
|-pc_factor_mat_ordering_type <natural,nd,1wd,rcm,qmd>||- set the row/column ordering of the factored matrix|
For BAIJ matrices this implements a point block ICC.
The Manteuffel shift is only implemented for matrices with block size 1
By default, the Manteuffel is applied (for matrices with block size 1). Call PCFactorSetShiftType(pc,MAT_SHIFT_POSITIVE_DEFINITE); to turn off the shift.
|1.||- TONY F. CHAN AND HENK A. VAN DER VORST, Review article: APPROXIMATE AND INCOMPLETE FACTORIZATIONS, Chapter in Parallel Numerical Algorithms, edited by D. Keyes, A. Semah, V. Venkatakrishnan, ICASE/LaRC Interdisciplinary Series in Science and Engineering, Kluwer.|