Calculus

If you look up yellow pig in the index, you find a quite a few page references. When you check these out, you find that each page has some reference to a pig, like the phrase “hog tired”. Apparently it was an inside joke between him and one of his classes. This fact of reference is only true of the first and second editions, but when you open to the the title page of the third edition, you find that the book has been “Dedicated to the Memory of Y.P.” -- which is of course “yellow pig”.

Special thanks to Joe Mermelstein for contributing this item.