PEPCISSSetSizes#

Sets the values of various size parameters in the CISS solver.

Synopsis#

#include "slepcpep.h" 
PetscErrorCode PEPCISSSetSizes(PEP pep,PetscInt ip,PetscInt bs,PetscInt ms,PetscInt npart,PetscInt bsmax,PetscBool realmats)

Logically Collective

Input Parameters#

  • pep - the polynomial eigensolver context

  • ip - number of integration points

  • bs - block size

  • ms - moment size

  • npart - number of partitions when splitting the communicator

  • bsmax - max block size

  • realmats - all coefficient matrices of \(P(\cdot)\) are real

Options Database Keys#

  • -pep_ciss_integration_points ip - sets the number of integration points

  • -pep_ciss_blocksize bs - sets the block size

  • -pep_ciss_moments ms - sets the moment size

  • -pep_ciss_partitions npart - sets the number of partitions

  • -pep_ciss_maxblocksize bsmax - sets the maximum block size

  • -pep_ciss_realmats (true|false) - all coefficient matrices of \(P(\cdot)\) are real

Notes#

For all integer arguments, you can use PETSC_CURRENT to keep the current value, and PETSC_DETERMINE to set them to a default value.

The default number of partitions is 1. This means the internal KSP object is shared among all processes of the PEP communicator. Otherwise, the communicator is split into npart communicators, so that npart KSP solves proceed simultaneously.

For a detailed description of the parameters see [Maeda et al., 2016].

References#

[Mae16]

Y. Maeda, T. Sakurai, and J. E. Roman. Contour integral spectrum slicing method in SLEPc. Technical Report STR-11, Universitat Politècnica de València, 2016. URL: https://slepc.upv.es/documentation.

See Also#

PEP: Polynomial Eigenvalue Problems, PEPCISS, PEPCISSGetSizes()

Level#

advanced

Location#

src/pep/impls/ciss/pciss.c

Implementations#

PEPCISSSetSizes_CISS() in src/pep/impls/ciss/pciss.c

Index of all PEP routines Table of Contents for all manual pages Index of all manual pages