petsc-3.10.2 2018-10-09
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MatMultDiagonalBlock

Computes the matrix-vector product, y = Dx. Where D is defined by the inode or block structure of the diagonal

Synopsis

#include "petscmat.h" 
PetscErrorCode MatMultDiagonalBlock(Mat mat,Vec x,Vec y)
Collective on Mat and Vec

Input Parameters

mat - the matrix
x - the vector to be multiplied

Output Parameters

y -the result

Notes

The vectors x and y cannot be the same. I.e., one cannot call MatMult(A,y,y).

See Also

MatMultTranspose(), MatMultAdd(), MatMultTransposeAdd()

Level

developer

Location

src/mat/interface/matrix.c

Implementations

MatMultDiagonalBlock_MPIAIJ in src/mat/impls/aij/mpi/mpiaij.c
MatMultDiagonalBlock_SeqAIJ_Inode in src/mat/impls/aij/seq/inode.c
MatMultDiagonalBlock_MPISELL in src/mat/impls/sell/mpi/mpisell.c

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