**petsc-master 2020-02-22**

# MatCreateNormal

Creates a new matrix object that behaves like A'*A.
### Synopsis

#include "petscmat.h"
PetscErrorCode MatCreateNormal(Mat A,Mat *N)

Collective on Mat

### Input Parameter

**A ** -the (possibly rectangular) matrix

### Output Parameter

**N ** -the matrix that represents A'*A

### Notes

The product A'*A is NOT actually formed! Rather the new matrix
object performs the matrix-vector product by first multiplying by
A and then A'

### Level

intermediate

### Location

src/mat/impls/normal/normm.c
### Examples

src/ksp/ksp/examples/tutorials/ex27.c.html

Index of all Mat routines

Table of Contents for all manual pages

Index of all manual pages