EPSSetPurify#
Deactivate eigenvector purification (which is activated by default).
Synopsis#
#include "slepceps.h"
PetscErrorCode EPSSetPurify(EPS eps,PetscBool purify)
Logically Collective
Input Parameters#
eps - the eigensolver context
purify - whether purification is required or not
Options Database Keys#
-eps_purify
- Sets/resets the boolean flag ‘purify’
Notes#
By default, eigenvectors of generalized symmetric eigenproblems are purified in order to purge directions in the nullspace of matrix B. If the user knows that B is non-singular, then purification can be safely deactivated and some computational cost is avoided (this is particularly important in interval computations).
See Also#
EPSGetPurify(), EPSSetInterval()
Level#
intermediate
Location#
Index of all EPS routines Table of Contents for all manual pages Index of all manual pages