slepc-3.21.1 2024-04-26
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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

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