slepc-3.22.1 2024-10-28
SVDTRLanczosSetOneSide
Indicate if the variant of the Lanczos method to be used is one-sided or two-sided.
Synopsis
#include "slepcsvd.h"
PetscErrorCode SVDTRLanczosSetOneSide(SVD svd,PetscBool oneside)
Logically Collective
Input Parameters
| svd | - singular value solver
|
| oneside | - boolean flag indicating if the method is one-sided or not
|
Options Database Key
| -svd_trlanczos_oneside <boolean> | - Indicates the boolean flag
|
Notes
By default, a two-sided variant is selected, which is sometimes slightly
more robust. However, the one-sided variant is faster because it avoids
the orthogonalization associated to left singular vectors.
One-sided orthogonalization is also available for the GSVD, in which case
two orthogonalizations out of three are avoided.
See Also
SVDLanczosSetOneSide()
Level
advanced
Location
src/svd/impls/trlanczos/trlanczos.c
Index of all SVD routines
Table of Contents for all manual pages
Index of all manual pages