EPSKrylovSchurSetDimensions#

Sets the dimensions used for each subsolve step in case of doing spectrum slicing for a computational interval. The meaning of the parameters is the same as in EPSSetDimensions().

Synopsis#

#include "slepceps.h" 
PetscErrorCode EPSKrylovSchurSetDimensions(EPS eps,PetscInt nev,PetscInt ncv,PetscInt mpd)

Logically Collective

Input Parameters#

  • eps - the eigenproblem solver context

  • nev - number of eigenvalues to compute

  • ncv - the maximum dimension of the subspace to be used by the subsolve

  • mpd - the maximum dimension allowed for the projected problem

Options Database Key#

  • -eps_krylovschur_nev - Sets the number of eigenvalues

  • -eps_krylovschur_ncv - Sets the dimension of the subspace

  • -eps_krylovschur_mpd - Sets the maximum projected dimension

Note#

Use PETSC_DETERMINE for ncv and mpd to assign a default value. For any of the arguments, use PETSC_CURRENT to preserve the current value.

See Also#

EPSKrylovSchurGetDimensions(), EPSSetDimensions(), EPSSetInterval()

Level#

advanced

Location#

src/eps/impls/krylov/krylovschur/krylovschur.c

Implementations#

EPSKrylovSchurSetDimensions_KrylovSchur() in src/eps/impls/krylov/krylovschur/krylovschur.c

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