NEPCISSSetExtraction#

Sets the extraction technique used in the CISS solver.

Synopsis#

#include "slepcnep.h" 
PetscErrorCode NEPCISSSetExtraction(NEP nep,NEPCISSExtraction extraction)

Logically Collective

Input Parameters#

  • nep - the nonlinear eigensolver context

  • extraction - the extraction technique

Options Database Key#

  • -nep_ciss_extraction - Sets the extraction technique (either ‘ritz’, ‘hankel’ or ‘caa’)

Notes#

By default, the Rayleigh-Ritz extraction is used (NEP_CISS_EXTRACTION_RITZ).

If the ‘hankel’ or the ‘caa’ option is specified (NEP_CISS_EXTRACTION_HANKEL or NEP_CISS_EXTRACTION_CAA), then the Block Hankel method, or the Communication-avoiding Arnoldi method, respectively, is used for extracting eigenpairs.

See Also#

NEPCISSGetExtraction(), NEPCISSExtraction

Level#

advanced

Location#

src/nep/impls/ciss/nciss.c

Implementations#

NEPCISSSetExtraction_CISS() in src/nep/impls/ciss/nciss.c

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