I've just browsed through a few Mathematics Jokes websites and
there's one joke which I don't really understand...I believe it's
also on AskedNRich, but someone just said "you'll understand it
later on".
Anyone care to explain the joke ''Let e < 0''?
Thanks 
Julian
Haha, I get it now I've done some analysis.
. Remember reading it a few years
ago and not having a clue what it was on about. *sad*