MatSetTransposeNullSpace

attaches the null space of a transpose of a matrix to the matrix

Synopsis

#include "petscmat.h" 
PetscErrorCode MatSetTransposeNullSpace(Mat mat, MatNullSpace nullsp)

Logically Collective

Input Parameters

• mat - the matrix

• nullsp - the null space object

Notes

This allows solving singular linear systems defined by the transpose of the matrix using KSP solvers with left preconditioning.

See MatSetNullSpace()

See Also

Matrices, Mat, MatNullSpace, MatCreate(), MatNullSpaceCreate(), MatSetNearNullSpace(), MatGetNullSpace(), MatSetNullSpace(), MatGetTransposeNullSpace(), MatNullSpaceRemove(), KSPSetPCSide()

Level

advanced

Location

src/mat/interface/matrix.c

Examples

src/ksp/ksp/tutorials/ex67.c

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Index of all Mat routines
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Index of all manual pages