From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/1836 Path: news.gmane.org!not-for-mail From: Marco Mackaay Newsgroups: gmane.science.mathematics.categories Subject: reference: normal categorical subgroup? Date: Fri, 9 Feb 2001 11:02:52 +0000 (GMT) Message-ID: NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1241018135 705 80.91.229.2 (29 Apr 2009 15:15:35 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Apr 2009 15:15:35 +0000 (UTC) To: categories@mta.ca Original-X-From: rrosebru@mta.ca Fri Feb 9 15:18:24 2001 -0400 Return-Path: Original-Received: (from Majordom@localhost) by mailserv.mta.ca (8.11.1/8.11.1) id f19Id7O30380 for categories-list; Fri, 9 Feb 2001 14:39:07 -0400 (AST) X-Authentication-Warning: mailserv.mta.ca: Majordom set sender to cat-dist@mta.ca using -f Original-Sender: cat-dist@mta.ca Precedence: bulk X-Keywords: X-UID: 18 Original-Lines: 13 Xref: news.gmane.org gmane.science.mathematics.categories:1836 Archived-At: To all category theorists, I'm looking for a reference to the definition of a normal categorical subgroup, i.e. the right kind of subgroupoid of a categorical group for taking the quotient. I know the definition, but I have no reference. Does anyone know a published origin of the definition? Best wishes, Marco Mackaay