MeatAxe
2.4

zte [Options] A B Result
This program reads in two matrices or permutations and writes out their tensor (Kronecker) product. If A is an m×n matrix, and B is an m'×n' matrix, the result is an mm'×nn' matrix consisting of all possible products of entries from A and B. An example may make this clearer:
$ zpr G1 matrix field=17 nor=2 noc=3 1 2 3 1 1 0 $ zpr G2 matrix field=17 nor=2 noc=2 2 0 1 3 $ zte G1 G2 P1 $ zpr P1 matrix field=17 nor=2 noc=6 2 0 4 0 6 0 1 3 2 6 3 9 2 0 2 0 0 0 1 3 1 3 0 0
If the input files contain permutations on n and n' points, respectively, the result is a permutation on nn' points, which describes the action of (A,B) on ordered pairs of points. This action is defined in the obvious way: (i,k) maps to (iA,kB). In the output, pairs are represented as numbers using the lexicographic ordering (1,1), ..., (1,n'), (2,1), ..., (n,n').