| -pc_jacobi_rowmax | - use the maximum absolute value in each row as the scaling factor, rather than the diagonal | |
| -pc_jacobi_abs | - use the absolute value of the diagaonl entry |
Notes: By using KSPSetPreconditionerSide(ksp,PC_SYMMETRIC) or -ksp_symmetric_pc you can scale each side of the matrix by the squareroot of the diagonal entries.
Zero entries along the diagonal are replaced with the value 1.0
Level:beginner
Location:src/ksp/pc/impls/jacobi/jacobi.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages