EPSLanczosReorthogType#

The type of reorthogonalization used in EPSLANCZOS.

Synopsis#

typedef enum { EPS_LANCZOS_REORTHOG_LOCAL,
               EPS_LANCZOS_REORTHOG_FULL,
               EPS_LANCZOS_REORTHOG_SELECTIVE,
               EPS_LANCZOS_REORTHOG_PERIODIC,
               EPS_LANCZOS_REORTHOG_PARTIAL,
               EPS_LANCZOS_REORTHOG_DELAYED } EPSLanczosReorthogType;

Values#

EPS_LANCZOS_REORTHOG_LOCAL - local orthogonalization, only involves previous two vectors
EPS_LANCZOS_REORTHOG_FULL - full orthogonalization against all previous vectors
EPS_LANCZOS_REORTHOG_SELECTIVE - selective reorthogonalization against nearly converged Ritz vectors
EPS_LANCZOS_REORTHOG_PERIODIC - periodic reorthogonalization against all previous vectors
EPS_LANCZOS_REORTHOG_PARTIAL - partial reorthogonalization against as subset of previous vectors
EPS_LANCZOS_REORTHOG_DELAYED - full orthogonalization with delayed reorthogonalization

Note#

Details of the different reorthogonalization strategies can be found in [Hernandez et al., 2006].

References#

[Her06]

V. Hernandez, J. E. Roman, A. Tomas, and V. Vidal. Lanczos methods in SLEPc. Technical Report STR-5, Universitat Politècnica de València, 2006. URL: https://slepc.upv.es/documentation.

Level#

advanced

Location#

include/slepceps.h

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