EPSCISSSetUseST#

Sets a flag indicating that the CISS solver will use the ST object for the linear solves.

Synopsis#

#include "slepceps.h" 
PetscErrorCode EPSCISSSetUseST(EPS eps,PetscBool usest)

Logically Collective

Input Parameters#

  • eps - the linear eigensolver context

  • usest - boolean flag to use the ST object or not

Options Database Key#

  • -eps_ciss_usest - whether the ST object will be used or not

Note#

When this option is set, the linear solves can be configured by setting options for the KSP object obtained with STGetKSP(). Otherwise, several KSP objects are created, which can be accessed with EPSCISSGetKSPs().

The default is to use the ST, unless several partitions have been specified, see EPSCISSSetSizes().

See Also#

EPS: Eigenvalue Problem Solver, EPSCISS, EPSCISSGetUseST(), EPSCISSSetSizes(), EPSCISSGetKSPs(), STGetKSP()

Level#

advanced

Location#

src/eps/impls/ciss/ciss.c

Implementations#

EPSCISSSetUseST_CISS() in src/eps/impls/ciss/ciss.c

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