KSPFCGSetMmax#

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

Synopsis#

#include "petscksp.h"  
PetscErrorCode KSPFCGSetMmax(KSP ksp, PetscInt mmax)

Note: mmax + 1 directions are stored (mmax previous ones along with a current one) and whether all are used in each iteration also depends on the truncation strategy (see KSPFCGSetTruncationType())

Logically Collective on ksp

Input Parameters#

  • ksp - the Krylov space context

  • mmax - the maximum number of previous directions to orthogonalize againt

See Also#

KSPFCG, KSPFCGGetTruncationType(), KSPFCGGetNprealloc()

Level#

intermediate

Location#

src/ksp/ksp/impls/fcg/fcg.c


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Index of all KSP routines
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