slepc-3.21.1 2024-04-26
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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

val  - the norm

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