KSPFCGSetMmax#
set the maximum number of previous directions KSPFCG will store for orthogonalization
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPFCGSetMmax(KSP ksp, PetscInt mmax)
Logically Collective
Input Parameters#
ksp - the Krylov space context
mmax - the maximum number of previous directions to orthogonalize against
Options Database Key#
-ksp_fcg_mmax
- maximum number of search directions
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()
See Also#
KSP: Linear System Solvers, KSPFCG, KSPFCGGetTruncationType(), KSPFCGGetNprealloc(), KSPFCGetMmax()
Level#
intermediate
Location#
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages