PEPCISSSetExtraction#

Sets the extraction technique used in the CISS solver.

Synopsis#

#include "slepcpep.h" 
PetscErrorCode PEPCISSSetExtraction(PEP pep,PEPCISSExtraction extraction)

Logically Collective

Input Parameters#

  • pep - the polynomial eigensolver context

  • extraction - the extraction technique, see PEPCISSExtraction for possible values

Options Database Key#

  • -pep_ciss_extraction <extraction> - sets the extraction technique, either ritz, hankel or caa

Notes#

By default, the Rayleigh-Ritz extraction is used (PEP_CISS_EXTRACTION_RITZ), see [Asakura et al., 2010].

If the hankel or the caa option is specified (PEP_CISS_EXTRACTION_HANKEL or PEP_CISS_EXTRACTION_CAA), then the block Hankel method, or the communication-avoiding Arnoldi method, respectively, is used for extracting eigenpairs.

References#

[Asa10]

J. Asakura, T. Sakurai, H. Tadano, T. Ikegami, and K. Kimura. A numerical method for polynomial eigenvalue problems using contour integral. Japan J. Indus. Appl. Math., 27(1):73–90, 2010. doi:10.1007/s13160-010-0005-x.

See Also#

PEP: Polynomial Eigenvalue Problems, PEPCISS, PEPCISSGetExtraction(), PEPCISSExtraction

Level#

advanced

Location#

src/pep/impls/ciss/pciss.c

Implementations#

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

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