petsc-3.7.7 2017-09-25
   
MatMultConstrained
The inner multiplication routine for a constrained matrix P^T A P. 
Synopsis
#include "petscmat.h" 
PetscErrorCode MatMultConstrained(Mat mat,Vec x,Vec y)
Neighbor-wise Collective on Mat and Vec
Input Parameters
|  | mat | - the matrix | 
|  | x | - the vector to be multilplied | 
Output Parameters
y  -the result
Notes
The vectors x and y cannot be the same.  I.e., one cannot
call MatMult(A,y,y).
Keywords
 matrix, multiply, matrix-vector product, constraint
See Also
 MatMult(), MatMultTranspose(), MatMultAdd(), MatMultTransposeAdd()
Level:beginner
Location:src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages