PCSOR

(S)SOR (successive over relaxation, Gauss-Seidel) preconditioning

Options Database Keys

-pc_sor_symmetric - Activates symmetric version
-pc_sor_backward - Activates backward version
-pc_sor_local_forward - Activates local forward version
-pc_sor_local_symmetric - Activates local symmetric version
-pc_sor_local_backward - Activates local backward version
-pc_sor_omega <omega> - Sets omega
-pc_sor_its <its> - Sets number of iterations
-pc_sor_lits <lits> - Sets number of local iterations

Notes: Only implemented for the AIJ matrix format. Not a true parallel SOR, in parallel this implementation corresponds to block Jacobi with SOR on each block.

See Also

PCCreate(), PCSetType(), PCType (for list of available types), PC,
PCSORSetIterations(), PCSORSetSymmetric(), PCSORSetOmega(), PCEISENSTAT

Level:beginner
Location:
src/sles/pc/impls/sor/sor.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/sles/examples/tutorials/ex21f.F.html