EPSSetOrthogonalization

Specifies the type of orthogonalization technique to be used inside the eigensolver.

Synopsis

#include "slepceps.h" 
int EPSSetOrthogonalization(EPS eps,EPSOrthogonalizationType type)
Collective on EPS

Input Parameters

eps - the eigensolver context obtained from EPSCreate
type - a known type of orthogonalization

Options Database Keys

-eps_ir_orth - Activates Iterative Refinement (IR) orthogonalization (default)
-eps_mgs_orth - Activates Modified Gram-Schmidt (MGS) orthogonalization
-eps_cgs_orth - Activates Classical Gram-Schmidt (CGS) orthogonalization

Notes

The default orthogonalization technique (IR, an iterative variant of CGS) works well for most problems. MGS is numerically more robust than CGS, but CGS may give better scalability.

See Also

EPSGetOrthogonalization()

Level:intermediate
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages