VecMDot#

Computes vector multiple 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#

VecMTDot(), VecDot()

Level#

intermediate

Location#

src/vec/vec/interface/rvector.c

Examples#

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

Implementations#

VecMDot_MPIKokkos in src/vec/vec/impls/mpi/kokkos/mpikok.kokkos.cxx
VecMDot_MPICUDA in src/vec/vec/impls/mpi/mpicuda/mpicuda.cu
VecMDot_MPIHIP in src/vec/vec/impls/mpi/mpihip/mpihip.hip.c
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_SeqCUDA in src/vec/vec/impls/seq/seqcuda/veccuda2.cu
VecMDot_SeqHIP in src/vec/vec/impls/seq/seqhip/vechip2.hip.c
VecMDot_SeqViennaCL in src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx


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