BVDotVec#

Computes multiple dot products of a vector against all the column vectors of a BV.

Synopsis#

#include "slepcbv.h" 
PetscErrorCode BVDotVec(BV X,Vec y,PetscScalar m[])

Collective

Input Parameters#

  • X - basis vectors

  • y - a vector

Output Parameter#

  • m - an array where the result must be placed

Notes#

This is analogue to VecMDot(), but using BV to represent a collection of vectors. The result is m = X^H*y, so m_i is equal to x_i^H y. Note that here X is transposed as opposed to BVDot().

If a non-standard inner product has been specified with BVSetMatrix(), then the result is m = X^HBy.

The length of array m must be equal to the number of active columns of X minus the number of leading columns, i.e. the first entry of m is the product of the first non-leading column with y.

See Also#

BVDot(), BVDotColumn(), BVSetActiveColumns(), BVSetMatrix()

Level#

intermediate

Location#

src/sys/classes/bv/interface/bvglobal.c

Implementations#

BVDotVec_Contiguous() in src/sys/classes/bv/impls/contiguous/contig.c
BVDotVec_Mat() in src/sys/classes/bv/impls/mat/bvmat.c
BVDotVec_Svec() in src/sys/classes/bv/impls/svec/svec.c
BVDotVec_Vecs() in src/sys/classes/bv/impls/vecs/vecs.c

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