petsc-3.5.1 2014-07-24
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MatNullSpaceTest

Tests if the claimed null space is really a null space of a matrix

Synopsis

#include "petscmat.h" 
PetscErrorCode  MatNullSpaceTest(MatNullSpace sp,Mat mat,PetscBool  *isNull)
Collective on MatNullSpace

Input Parameters

sp - the null space context
mat - the matrix

Output Parameters

isNull -PETSC_TRUE if the nullspace is valid for this matrix

Keywords

PC, null space, remove

See Also

MatNullSpaceCreate(), MatNullSpaceDestroy(), MatNullSpaceSetFunction()

Level:advanced
Location:
src/mat/interface/matnull.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/snes/examples/tutorials/ex62.c.html