EPSLanczosSetReorthog#

Sets the type of reorthogonalization used during the Lanczos iteration.

Synopsis#

#include "slepceps.h" 
PetscErrorCode EPSLanczosSetReorthog(EPS eps,EPSLanczosReorthogType reorthog)

Logically Collective

Input Parameters#

  • eps - the linear eigensolver context

  • reorthog - the type of reorthogonalization, see EPSLanczosReorthogType for possible values

Options Database Key#

  • -eps_lanczos_reorthog <reorthog> - sets the reorthogonalization type

Notes#

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

This applies to EPSLANCZOS, not to EPSKRYLOVSCHUR.

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.

See Also#

EPS: Eigenvalue Problem Solver, EPSLANCZOS, EPSLanczosGetReorthog(), EPSLanczosReorthogType

Level#

advanced

Location#

src/eps/impls/krylov/lanczos/lanczos.c

Implementations#

EPSLanczosSetReorthog_Lanczos() in src/eps/impls/krylov/lanczos/lanczos.c

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