petsc-3.7.5 2017-01-01
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KSPFCGSetTruncationType

 specify how many of its stored previous directions FCG uses during orthoganalization

Synopsis

#include "petscksp.h"  
PetscErrorCode KSPFCGSetTruncationType(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)) stored directions at iteration i=0,1,..

Input Parameters

ksp - the Krylov space context
truncstrat - the choice of strategy

Options Database

-ksp_fcg_truncation_type <standard, notay> -specify how many of its stored previous directions FCG uses during orthoganalization

.seealso: KSPFCDTruncationType, KSPFCGGetTruncationType

Level:intermediate
Location:src/ksp/ksp/impls/fcg/fcg.c
Index of all KSP routines
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Index of all manual pages