petsc-3.9.4 2018-09-11
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
Examples
src/snes/examples/tutorials/ex62.c.html
src/ts/examples/tutorials/ex50.c.html
src/tao/unconstrained/examples/tutorials/spectraladjointassimilation.c.html
Index of all Mat routines
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Index of all manual pages