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

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).

Level: beginner

See Also

MatMult(), MatMultTranspose(), MatMultAdd(), MatMultTransposeAdd()

Location:matrix.c