petsc-3.7.7 2017-09-25
   
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
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages