EPSGDSetInitialSize

Sets the initial size of the searching space.

Synopsis

#include "slepceps.h" 
PetscErrorCode EPSGDSetInitialSize(EPS eps,PetscInt initialsize)
Logically Collective on EPS

Input Parameters

eps - the eigenproblem solver context
initialsize - number of vectors of the initial searching subspace

Options Database Key

-eps_gd_initial_size - number of vectors of the initial searching subspace

Notes

If EPSGDGetKrylovStart is PETSC_FALSE and the user provides vectors with EPSSetInitialSpace, up to initialsize vectors will be used; and if the provided vectors are not enough, the solver completes the subspace with random vectors. In the case of EPSGDGetKrylovStart being PETSC_TRUE, the solver gets the first vector provided by the user or, if not available, a random vector, and expands the Krylov basis up to initialsize vectors.

See Also

EPSGDGetInitialSize(), EPSGDGetKrylovStart()

Location: src/eps/impls/davidson/gd/gd.c
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages