KSPFCGSetTruncationType#
specify how many of its stored previous directions KSPFCG uses during orthoganalization
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPFCGSetTruncationType(KSP ksp, KSPFCDTruncationType truncstrat)
Logically Collective
Input Parameters#
ksp - the Krylov space context
truncstrat - the choice of strategy
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,..
Options Database Key#
-ksp_fcg_truncation_type <standard, notay> - specify how many of its stored previous directions
KSPFCGuses during orthoganalization
See Also#
KSP: Linear System Solvers, KSPFCDTruncationType, KSPFCGGetTruncationType(), KSPFCGSetNprealloc(), KSPFCGSetMmax(), KSPFCGGetMmax(),
KSP_FCD_TRUNC_TYPE_STANDARD, KSP_FCD_TRUNC_TYPE_NOTAY
Level#
intermediate
Location#
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages