From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/5500 Path: news.gmane.org!not-for-mail From: =?iso-8859-1?Q?Joyal=2C_Andr=E9?= Newsgroups: gmane.science.mathematics.categories Subject: equality is beautiful Date: Fri, 8 Jan 2010 22:29:00 -0500 Message-ID: References: Reply-To: =?iso-8859-1?Q?Joyal=2C_Andr=E9?= NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1263048527 10419 80.91.229.12 (9 Jan 2010 14:48:47 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 9 Jan 2010 14:48:47 +0000 (UTC) To: Original-X-From: categories@mta.ca Sat Jan 09 15:48:40 2010 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from mailserv.mta.ca ([138.73.1.1]) by lo.gmane.org with esmtp (Exim 4.50) id 1NTccJ-0007V0-Au for gsmc-categories@m.gmane.org; Sat, 09 Jan 2010 15:48:39 +0100 Original-Received: from Majordom by mailserv.mta.ca with local (Exim 4.61) (envelope-from ) id 1NTcBM-0003xK-Go for categories-list@mta.ca; Sat, 09 Jan 2010 10:20:48 -0400 Original-Sender: categories@mta.ca Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:5500 Archived-At: Dear All Many people seem to distrust the equality=20 relation between the objects of a (large) category. Is this a philosophical conundrum or a mathematical problem? Can we define a notion of (large) category without supposing=20 that its (large) set of objects has a diagonal? Best, Andr=E9 [For admin and other information see: http://www.mta.ca/~cat-dist/ ]