petsc-3.13.6 2020-09-29
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
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