From eclark@tarski.math.usf.edu Tue Feb 17 09:52:28 1998 Received: from tarski.math.usf.edu (tarski.math.usf.edu [131.247.215.19]) by euclid.math.temple.edu (8.8.5/8.8.5) with ESMTP id JAA18779 for ; Tue, 17 Feb 1998 09:52:26 -0500 (EST) Received: from localhost (eclark@localhost) by tarski.math.usf.edu (8.8.5/8.6.5) with SMTP id JAA05274; Tue, 17 Feb 1998 09:49:09 -0600 (CST) Date: Tue, 17 Feb 1998 09:49:08 -0600 (CST) From: Edwin Clark X-Sender: eclark@tarski Reply-To: Edwin Clark To: ekhad@euclid.math.temple.edu cc: Kathy Jensen Subject: The Devil's Proof of Morley's Theorem Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Content-Length: 1242 Status: R Dear Shalosh B. Ekhad, Recently Mourad Ismail gave me your proof of Napoleon's Theorem that was sent to him by Doron Zeilberger. Since I am teaching a course in Maple this semester I decided to go through it. I presented it to my class and explained why it is a proof. Then I assigned them the project of checking the code in your paper A Proof of Morley's Theorem (From The (Devil's) Book). Some static electricity must have intervened and caused you to make a little mistake on the next to last line of the procedure morley. There you have normal(ABsq-BCsq),normal(ABsq-BCsq); The second BCsq should be ACsq. You may draw your own moral about such matters. (I missed it myself, since I was so busy trying to insure that the rest of the procedure way okay!) The error was noticed by Kathy Jensen. So if you send awards for people finding errors in your papers you should send one to her. Her email address is jensen@math.usf.edu and her snail mail address is the same as that in my signature below. Best Regards, Edwin ==================================================== W. Edwin Clark, Department of Mathematics University of South Florida, Tampa, FL 33620-5700 eclark@tarski.math.usf.edu