slepc-3.16.1 2021-11-17
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STCheckNullSpace

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.

Synopsis

#include "slepcst.h" 
PetscErrorCode STCheckNullSpace(ST st,BV V)
Collective on st

Input Parameters

st  - the spectral transformation context
V  - basis 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/sys/classes/st/interface/stsles.c
Index of all ST routines
Table of Contents for all manual pages
Index of all manual pages