Deactivate eigenvector purification (which is activated by default).
PetscErrorCode EPSSetPurify(EPS eps,PetscBool purify)
Logically Collective on EPS
|eps || - the eigensolver context
|purify || - whether purification is required or not
Options Database Keys
|-eps_purify <boolean> || - Sets/resets the boolean flag 'purify'
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).
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages