MatMultTransposeConstrained

The inner multiplication routine for a constrained matrix P^T A^T P.

#include "petscmat.h" 
int MatMultTransposeConstrained(Mat mat,Vec x,Vec y)

Collective on Mat and Vec

	mat	- the matrix
	x	- the vector to be multilplied

y -the result

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

matrix, multiply, matrix-vector product, constraint