SVDTRLanczosSetRestart#

Sets the restart parameter for the thick-restart Lanczos method, in particular the proportion of basis vectors that must be kept after restart.

Synopsis#

#include "slepcsvd.h" 
PetscErrorCode SVDTRLanczosSetRestart(SVD svd,PetscReal keep)

Logically Collective

Input Parameters#

  • svd - the singular value solver context

  • keep - the number of vectors to be kept at restart

Options Database Key#

  • -svd_trlanczos_restart - Sets the restart parameter

Notes#

Allowed values are in the range [0.1,0.9]. The default is 0.5.

See Also#

SVD: Singular Value Decomposition, SVDTRLanczosGetRestart()

Level#

advanced

Location#

src/svd/impls/trlanczos/trlanczos.c

Implementations#

SVDTRLanczosSetRestart_TRLanczos() in src/svd/impls/trlanczos/trlanczos.c

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