EPSCISSSetThreshold#

Sets the values of various threshold parameters in the CISS solver.

Synopsis#

#include "slepceps.h" 
PetscErrorCode EPSCISSSetThreshold(EPS eps,PetscReal delta,PetscReal spur)

Logically Collective

Input Parameters#

  • eps - the linear eigensolver context

  • delta - threshold for numerical rank

  • spur - spurious threshold (to discard spurious eigenpairs)

Options Database Keys#

  • -eps_ciss_delta <delta> - sets the delta

  • -eps_ciss_spurious_threshold <spur> - sets the spurious threshold

Notes#

PETSC_CURRENT can be used to preserve the current value of any of the arguments, and PETSC_DETERMINE to set them to a default value.

For a detailed description of the parameters see [Maeda et al., 2016].

References#

[Mae16]

Y. Maeda, T. Sakurai, and J. E. Roman. Contour integral spectrum slicing method in SLEPc. Technical Report STR-11, Universitat Politècnica de València, 2016. URL: https://slepc.upv.es/documentation.

See Also#

EPS: Eigenvalue Problem Solver, EPSCISS, EPSCISSGetThreshold(), EPSCISSSetSizes(), EPSCISSSetRefinement()

Level#

advanced

Location#

src/eps/impls/ciss/ciss.c

Implementations#

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

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