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

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_type hermitian - Indicates Hermitian matrix

• -ksp_cg_type symmetric - Indicates symmetric matrix

Note

By default, the matrix is assumed to be complex, Hermitian.

See Also

KSP: Linear System Solvers, 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

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Index of all KSP routines
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Index of all manual pages