KSPPIPEFCGSetTruncationType#
specify how many of its stored previous directions KSPPIPEFCG
uses during orthoganalization
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPPIPEFCGSetTruncationType(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 max(1,mod(i,mmax)) stored directions at iteration i=0,1,..
Options Database Key#
-ksp_pipefcg_truncation_type <standard,notay> - which stored search directions to orthogonalize against
See Also#
KSP: Linear System Solvers, KSPPIPEFCG
, KSPPIPEFCGGetTruncationType
, KSPFCDTruncationType
Level#
intermediate
Location#
src/ksp/ksp/impls/fcg/pipefcg/pipefcg.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages