VecCheckOrthonormality#

Checks (or prints) the level of (bi-)orthonormality of a set of vectors.

Synopsis#

#include "slepcvec.h" 
PetscErrorCode VecCheckOrthonormality(Vec V[],PetscInt nv,Vec W[],PetscInt nw,Mat B,PetscViewer viewer,PetscReal *lev)

Collective

Input Parameters#

V - a set of vectors
nv - number of V vectors
W - an alternative set of vectors (optional)
nw - number of W vectors
B - Hermitian matrix defining the inner product (optional)
viewer - optional visualization context

Output Parameter#

lev - level of orthogonality (optional)

Notes#

This function is equivalent to VecCheckOrthonormality(), but in addition it checks that the diagonal of \(W^*V\) (or \(W^*BV\)) is equal to all ones.

Level#

developer

Location#

src/sys/vec/vecutil.c

Examples#

src/svd/tutorials/ex52.c
src/svd/tutorials/ex45.c
src/svd/tutorials/ex53.c
src/eps/tutorials/ex47.c

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