Interesting point.  I think if this function is grouped with other matrix operations, "cartesian-porduct" is the ideal name like you say.  If it's grouped with "make-permutations", then "make-combinations" would follow.  Perhaps I will export it under both names.  Thanks for the comment Corey <div>On 1/18/07, Eric Hanchrow <<a href="mailto:offby1@blarg.net">offby1@blarg.net</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I think a more informative name than "make-combinations" would be "cartesian-product". -- One of the fundamental philosophical questions of our time is why Goofy is a person and Pluto is a dog.         -- Roger Ebert _________________________________________________   For list-related administrative tasks:   <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme">http://list.cs.brown.edu/mailman/listinfo/plt-scheme </a> </blockquote></div> -- ((lambda (y) (y y)) (lambda (y) (y y)))