... since it's been a bit quiet, here's a test for your (beginning) category theory students, list moderator willing. Get them to check out http://www.corbisimages.com/Search#pg=peter+m+fisher&mlt=42-19062533&mla=19062533 and see how much category theory they can find, and explain. I was involved in a number of these photos, and even put in current research (even some then - and now! - unpublished stuff). One of these photos was mentioned at the Secret Blogging Seminar http://sbseminar.wordpress.com/2008/07/01/maths-in-advertising/#comment-3648, namely this one: http://www.corbisimages.com/stock-photo/rights-managed/42-17571994/advanced-..., used in an advert in New York. Poignant to see Loday's name in this one: http://www.corbisimages.com/stock-photo/rights-managed/42-19062533/man-looki..., from four or so years ago. David [For admin and other information see: http://www.mta.ca/~cat-dist/ ]