STCheckNullSpace
Given a set of vectors, this function tests each of them to be a nullspace vector of the coefficient matrix of the associated KSP object. All these nullspace vectors are passed to the KSP object.
Synopsis
#include "slepcst.h"
PetscErrorCode STCheckNullSpace(ST st,PetscInt n,const Vec V[])
Collective on ST
Input Parameters
| st | - the spectral transformation context
|
| n | - number of vectors
|
| V | - vectors to be checked
|
Note
This function allows to handle singular pencils and to solve some problems
in which the nullspace is important (see the users guide for details).
See Also
EPSSetDeflationSpace()
Location: src/st/interface/stsles.c
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