Digging very deep in my old maths knowledge, I think it is called Outer product or cross product and it is used in vector and matrix maths..

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

In reply to Re: Combinations / permutations... not even sure what this is called by CountZero
in thread Combinations / permutations... not even sure what this is called by tunafish

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