cristy@eplrx7.uucp (John Cristy) (02/02/91)
I would like to obtain Fortran source code for obtaining the outer
product of two square matrices which may be of different size.
This product is also called the tensor, Kronecker or direct product.
The elements of the product matrix follow the so-called lexicographical
ordering, the gist of which may be gathered from the abbreviated
notation (where A and B are matrices):
A (x) B = A(1,1)B A(1,2)B ....
A(2,1)B A(2,2)B ....
.. .. ....
Outer products of this sort provide a way of building higher-rank
tensors from lower rank ones, and typical applications include coupling
of spin angular momenta.
Please reply via Email. And thanks in advance.
roe%esvax@dupont.com
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