VecMDot#

Computes multiple vector dot products.

Synopsis#

#include "petscvec.h"   
PetscErrorCode VecMDot(Vec x, PetscInt nv, const Vec y[], PetscScalar val[])

Collective

Input Parameters#

x - one vector
nv - number of vectors
y - array of vectors.

Output Parameter#

val - array of the dot products (does not allocate the array)

Notes for Users of Complex Numbers#

For complex vectors, VecMDot() computes

val = (x,y) = y^H x,

where y^H denotes the conjugate transpose of y.

Use VecMTDot() for the indefinite form

val = (x,y) = y^T x,

where y^T denotes the transpose of y.

See Also#

Vectors and Parallel Data, Vec, VecMTDot(), VecDot()

Level#

intermediate

Location#

src/vec/vec/interface/rvector.c

Examples#

src/vec/vec/tutorials/ex1.c
src/vec/vec/tutorials/ex1f.F90
src/vec/vec/tutorials/ex1f90.F90
src/vec/vec/tutorials/ex20f90.F90

Implementations#

VecMDot_MPIKokkos in src/vec/vec/impls/mpi/kokkos/mpikok.kokkos.cxx
VecMDot_MPIViennaCL in src/vec/vec/impls/mpi/mpiviennacl/mpiviennacl.cxx
VecMDot_MPI in src/vec/vec/impls/mpi/pvec2.c
VecMDot_Nest in src/vec/vec/impls/nest/vecnest.c
VecMDot_Seq in src/vec/vec/impls/seq/dvec2.c
VecMDot_Seq in src/vec/vec/impls/seq/dvec2.c
VecMDot_SeqKokkos in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx
VecMDot_SeqViennaCL in src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx

Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages