EPSCISSSetExtraction#

Sets the extraction technique used in the CISS solver.

Synopsis#

#include "slepceps.h" 
PetscErrorCode EPSCISSSetExtraction(EPS eps,EPSCISSExtraction extraction)

Logically Collective

Input Parameters#

  • eps - the linear eigensolver context

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

Options Database Key#

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

Notes#

By default, the Rayleigh-Ritz extraction is used (EPS_CISS_EXTRACTION_RITZ), see [Sakurai and Tadano, 2007].

If the hankel option is specified (EPS_CISS_EXTRACTION_HANKEL), then the block Hankel method is used for extracting eigenpairs [Sakurai and Sugiura, 2003].

References#

[Sak03]

T. Sakurai and H. Sugiura. A projection method for generalized eigenvalue problems using numerical integration. J. Comput. Appl. Math., 159(1):119–128, 2003. doi:10.1016/S0377-0427(03)00565-X.

[Sak07]

T. Sakurai and H. Tadano. CIRR: a Rayleigh-Ritz type method with contour integral for generalized eigenvalue problems. Hokkaido Math. J., 36(4):745–757, 2007. doi:10.14492/hokmj/1272848031.

See Also#

EPS: Eigenvalue Problem Solver, EPSCISS, EPSCISSGetExtraction(), EPSCISSExtraction

Level#

advanced

Location#

src/eps/impls/ciss/ciss.c

Implementations#

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

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