slepc-3.22.1 2024-10-28
NEPNLEIGSSetFullBasis
Choose between TOAR-basis (default) and full-basis variants of the NLEIGS method.
Synopsis
#include "slepcnep.h"
PetscErrorCode NEPNLEIGSSetFullBasis(NEP nep,PetscBool fullbasis)
Logically Collective
Input Parameters
| nep | - the nonlinear eigensolver context
|
| fullbasis | - true if the full-basis variant must be selected
|
Options Database Key
| -nep_nleigs_full_basis | - Sets the full-basis flag
|
Notes
The default is to use a compact representation of the Krylov basis, that is,
V = (I otimes U) S, with a tensor BV. This behaviour can be changed so that
the full basis V is explicitly stored and operated with. This variant is more
expensive in terms of memory and computation, but is necessary in some cases,
particularly for two-sided computations, see NEPSetTwoSided().
In the full-basis variant, the NLEIGS solver uses an EPS object to explicitly
solve the linearized eigenproblem, see NEPNLEIGSGetEPS().
See Also
NEPNLEIGSGetFullBasis(), NEPNLEIGSGetEPS(), NEPSetTwoSided(), BVCreateTensor()
Level
advanced
Location
src/nep/impls/nleigs/nleigs.c
Examples
src/nep/tutorials/ex42.c
Index of all NEP routines
Table of Contents for all manual pages
Index of all manual pages