petsc-3.12.5 2020-03-29
KSPPIPEGCRSetTruncationType
specify how many of its stored previous directions PIPEGCR uses during orthoganalization
Synopsis
#include "petscksp.h"
PetscErrorCode KSPPIPEGCRSetTruncationType(KSP ksp,KSPFCDTruncationType truncstrat)
Logically Collective on ksp
KSP_FCD_TRUNC_TYPE_STANDARD uses all (up to mmax) stored directions
KSP_FCD_TRUNC_TYPE_NOTAY uses the last max(1,mod(i,mmax)) directions at iteration i=0,1,..
Input Parameters
| ksp | - the Krylov space context
|
| truncstrat | - the choice of strategy
|
Options Database
-ksp_pipegcr_truncation_type <standard,notay> -which stored basis vectors to orthogonalize against
See Also
KSPPIPEGCR, KSPPIPEGCRSetTruncationType, KSPPIPEGCRTruncationType, KSPFCDTruncationType
Level
intermediate
Location
src/ksp/ksp/impls/gcr/pipegcr/pipegcr.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages