kron
====

Kronecker product (.*.)



Calling Sequence
~~~~~~~~~~~~~~~~


::

    kron(A,B)
    A.*.B




Description
~~~~~~~~~~~

`kron(A,B)` or `A.*.B` returns the Kronecker tensor product of two
matrices `A` and `B`. The resulting matrix has the following block
form:

If `A` is a `m x n` matrix and `B` a `p x q` matrix then `A.*.B` is a
`(m*p) x (n*q)` matrix.

`A` and `B` can be sparse matrices.



Examples
~~~~~~~~


::

    A=[1,2;3,4];
    kron(A,A)
    A.*.A
    `sparse`_(A).*.`sparse`_(A)
    A(1,1)=%i;
    kron(A,A)