From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/6560 Path: news.gmane.org!not-for-mail From: David Roberts Newsgroups: gmane.science.mathematics.categories Subject: comma objects Date: Wed, 2 Mar 2011 09:35:50 +1030 Message-ID: Reply-To: David Roberts NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: dough.gmane.org 1299027383 5819 80.91.229.12 (2 Mar 2011 00:56:23 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Wed, 2 Mar 2011 00:56:23 +0000 (UTC) To: categories@mta.ca Original-X-From: majordomo@mlist.mta.ca Wed Mar 02 01:56:15 2011 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtpx.mta.ca ([138.73.1.114]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PuaMQ-0001Mf-9m for gsmc-categories@m.gmane.org; Wed, 02 Mar 2011 01:56:14 +0100 Original-Received: from mlist.mta.ca ([138.73.1.63]:38297) by smtpx.mta.ca with esmtp (Exim 4.71) (envelope-from ) id 1PuaMK-0002Oz-5m; Tue, 01 Mar 2011 20:56:08 -0400 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1PuaME-0005SL-Sm for categories-list@mlist.mta.ca; Tue, 01 Mar 2011 20:56:02 -0400 Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:6560 Archived-At: Hi all, when were (lax) comma objects in a 2-category introduced, and by whom? By lax comma object I mean the thing described here: http://ncatlab.org/nlab/show/comma+object, where \alpha is not necessarily invertible. Thanks, David [For admin and other information see: http://www.mta.ca/~cat-dist/ ]