petsc-3.10.2 2018-10-09
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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