From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/8022 Path: news.gmane.org!not-for-mail From: Luiz Henrique Newsgroups: gmane.science.mathematics.categories Subject: Re: P.J. Higgins' "Categories and Groupoids" question .... Date: Thu, 20 Feb 2014 14:46:59 -0300 Message-ID: References: Reply-To: Luiz Henrique NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1392992091 2672 80.91.229.3 (21 Feb 2014 14:14:51 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 21 Feb 2014 14:14:51 +0000 (UTC) Cc: Categories mailing list To: "Vasili I. Galchin" Original-X-From: majordomo@mlist.mta.ca Fri Feb 21 15:15:01 2014 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtp3.mta.ca ([138.73.1.186]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WGqsW-0006KN-Ka for gsmc-categories@m.gmane.org; Fri, 21 Feb 2014 15:15:00 +0100 Original-Received: from mlist.mta.ca ([138.73.1.63]:50977) by smtp3.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1WGqrp-0004lO-BE; Fri, 21 Feb 2014 10:14:17 -0400 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1WGqrn-0005fY-M6 for categories-list@mlist.mta.ca; Fri, 21 Feb 2014 10:14:15 -0400 In-Reply-To: Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:8022 Archived-At: Hello Vasili. I don't know if this is what you are looking for but I have some (very short) notes on arxiv about groupoid objects in categories. There, the idea is to avoid set theoretical considerations as far as possible. The link is http://arxiv.org/abs/1207.3694 Best regards, Luiz [For admin and other information see: http://www.mta.ca/~cat-dist/ ]