petsc-3.12.5 2020-03-29

MatCreateNormalHermitian

Creates a new matrix object that behaves like (A*)'*A.

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

Collective on Mat

A -the (possibly rectangular complex) matrix

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

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*)'

intermediate