From: utzoo!decvax!harpo!seismo!presby!burdvax!psuvax!allegra!linus!genrad!wjh12!foxvax1!brunix!grafix!dsf Newsgroups: net.jokes Title: Re: math jokes... Article-I.D.: grafix.1151 Posted: Thu May 19 14:55:30 1983 Received: Sat May 21 04:53:30 1983 Q: What's purple and commutes? A: An Abelian grape. (at least that's how I heard it.) David Fox Brown U.