PETSc version 3.15.5
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
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_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