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

EPSAttachDeflationSpace()

Location: src/st/interface/stsles.c
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