slepc-main 2024-12-17
EPSKrylovSchurGetKSP
Retrieve the linear solver object associated with the internal EPS object in case of doing spectrum slicing for a computational interval.
Synopsis
#include "slepceps.h"
PetscErrorCode EPSKrylovSchurGetKSP(EPS eps,KSP *ksp)
Collective
Input Parameter
| eps | - the eigenproblem solver context
|
Output Parameter
| ksp | - the internal KSP object
|
Notes
When invoked to compute all eigenvalues in an interval with spectrum
slicing, EPSKRYLOVSCHUR creates another EPS object internally that is
used to compute eigenvalues by chunks near selected shifts. This function
allows access to the KSP object associated to this internal EPS object.
This function is only available for spectrum slicing runs. In case of
having more than one partition, the returned KSP will be different
in MPI processes belonging to different partitions. Hence, if required,
EPSKrylovSchurSetPartitions() must be called BEFORE this function.
See Also
EPSSetInterval(), EPSKrylovSchurSetPartitions()
Level
advanced
Location
src/eps/impls/krylov/krylovschur/krylovschur.c
Examples
src/eps/tutorials/ex12.c
src/eps/tutorials/ex25.c
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages