petsc-3.8.4 2018-03-24
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KSPPIPEFCGSetMmax

 set the maximum number of previous directions PIPEFCG will store for orthogonalization

Synopsis

#include "petscksp.h"  
PetscErrorCode KSPPIPEFCGSetMmax(KSP ksp,PetscInt mmax)
Note: mmax + 1 directions are stored (mmax previous ones along with the current one) and whether all are used in each iteration also depends on the truncation strategy (see KSPPIPEFCGSetTruncationType)

Logically Collective on KSP

Input Parameters

ksp - the Krylov space context
mmax - the maximum number of previous directions to orthogonalize against

Options Database

-ksp_pipefcg_mmax <N> -

See Also

KSPPIPEFCG, KSPPIPEFCGSetTruncationType(), KSPPIPEFCGSetNprealloc()

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