slepc-3.22.2 2024-12-02
STCheckNullSpace
Tests if constraint vectors are nullspace vectors.
Synopsis
#include "slepcst.h"
PetscErrorCode STCheckNullSpace(ST st,BV V)
Collective
Input Parameters
| st | - the spectral transformation context
|
| V | - basis vectors to be checked
|
Notes
Given a basis vectors object, this function tests each of its constraint
vectors to be a nullspace vector of the coefficient matrix of the
associated KSP object. All these nullspace vectors are passed to the KSP
object.
This function allows handling singular pencils and solving some problems
in which the nullspace is important (see the users guide for details).
See Also
EPSSetDeflationSpace()
Level
developer
Location
src/sys/classes/st/interface/stsles.c
Index of all ST routines
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Index of all manual pages