| -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. |