PCSORSetOmega#

Sets the SOR relaxation coefficient, omega (where omega = 1.0 by default).

Synopsis#

#include "petscpc.h" 
PetscErrorCode PCSORSetOmega(PC pc, PetscReal omega)

Logically Collective

Input Parameters#

  • pc - the preconditioner context

  • omega - relaxation coefficient (0 < omega < 2).

Options Database Key#

  • -pc_sor_omega - Sets omega

Note#

If omega != 1, you will need to set the MAT_USE_INODES option to PETSC_FALSE on the matrix.

See Also#

KSP: Linear System Solvers, PCSOR, PCSORSetSymmetric(), PCSORSetIterations(), PCEisenstatSetOmega(), MatSetOption()

Level#

intermediate

Location#

src/ksp/pc/impls/sor/sor.c

Implementations#

PCSORSetOmega_SOR() in src/ksp/pc/impls/sor/sor.c


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