slepc-3.22.2 2024-12-02
BVNormColumn
Computes the vector norm of a selected column.
Synopsis
#include "slepcbv.h"
PetscErrorCode BVNormColumn(BV bv,PetscInt j,NormType type,PetscReal *val)
Collective
Input Parameters
| bv | - basis vectors
|
| j | - column number to be used
|
| type | - the norm type
|
Output Parameter
Notes
The norm of V[j] is computed (NORM_1, NORM_2, or NORM_INFINITY).
If a non-standard inner product has been specified with BVSetMatrix(),
then the returned value is sqrt(V[j]'*B*V[j]),
where B is the inner product matrix (argument 'type' is ignored).
See Also
BVNorm(), BVNormVec(), BVNormalize(), BVSetActiveColumns(), BVSetMatrix()
Level
intermediate
Location
src/sys/classes/bv/interface/bvglobal.c
Index of all BV routines
Table of Contents for all manual pages
Index of all manual pages