Computing a kronecker product of two matrices

[Amok]

Does anyone know an algorithm for computing kronecker products of two matrices? It's probably not that hard, but I feel like my head is about to explode ATM, so if you can help me out that'd be cool. I want to implement this in fortran... I'll give you an example; Say I want compute the kronecker product between two 2x2 matrices (http://en.wikipedia.org/wiki/Tensor_product#Kronecker_product_of_two_matrices). I know that in the end the result of the product is a tensor, so the straightforward way to do this would be to create a rank 4 tensor in the program, but that's unwieldy... What I want is to generate a matrix (4x4), starting from these 2x2 matrices.

 

[Fredrik]

It seems to me that the definition you linked to has all the information you need. You probably just need to take a break, do something else for a couple of hours, and return to it with a fresh mind. If you have already tried that, then you should probably be more specific about what's causing you problems.

 

[oleador]

I know Matlab is quite different from Fortran, but maybe this will help:
http://www.mathworks.com/matlabcentral/fileexchange/28889-kronecker-product/content/kron.m