slepc-3.10.0 2018-09-18
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EPSSetPurify

Deactivate eigenvector purification (which is activated by default).

Synopsis

#include "slepceps.h" 
PetscErrorCode EPSSetPurify(EPS eps,PetscBool purify)
Logically Collective on EPS

Input Parameters

eps  - the eigensolver context
purify  - whether purification is required or not

Options Database Keys

-eps_purify <boolean>  - 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()

Location: src/eps/interface/epsopts.c
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages