petsc-3.11.4 2019-09-28
KSPCGSetType
Sets the variant of the conjugate gradient method to use for solving a linear system with a complex coefficient matrix. This option is irrelevant when solving a real system.
Synopsis
#include "petscksp.h"
PetscErrorCode KSPCGSetType(KSP ksp,KSPCGType type)
Logically Collective on KSP
Input Parameters
| ksp | - the iterative context
|
| type | - the variant of CG to use, one of
|
KSP_CG_HERMITIAN - complex, Hermitian matrix (default)
KSP_CG_SYMMETRIC - complex, symmetric matrix
Options Database Keys
| -ksp_cg_hermitian | - Indicates Hermitian matrix
|
| -ksp_cg_symmetric | - Indicates symmetric matrix
|
Note
By default, the matrix is assumed to be complex, Hermitian.
Keywords
CG, conjugate gradient, Hermitian, symmetric, set, type
See Also
KSP, KSPCG
Level
intermediate
Location
src/ksp/ksp/impls/cg/cgtype.c
Implementations
KSPCGSetType_CG in src/ksp/ksp/impls/cg/cg.c
KSPCGSetType_CGNE in src/ksp/ksp/impls/cg/cgne/cgne.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages