From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/9198 Path: news.gmane.org!.POSTED!not-for-mail From: RONALD BROWN Newsgroups: gmane.science.mathematics.categories Subject: Re: Simplicial acyclic models Date: Thu, 27 Apr 2017 22:12:18 +0100 (BST) Message-ID: Reply-To: RONALD BROWN NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1493421148 15889 195.159.176.226 (28 Apr 2017 23:12:28 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 28 Apr 2017 23:12:28 +0000 (UTC) Cc: "categories@mta.ca" To: Michael Barr Original-X-From: majordomo@mlist.mta.ca Sat Apr 29 01:12:21 2017 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtp2.mta.ca ([198.164.44.40]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1d4F3l-0003xJ-B8 for gsmc-categories@m.gmane.org; Sat, 29 Apr 2017 01:12:21 +0200 Original-Received: from mlist.mta.ca ([138.73.1.63]:49619) by smtp2.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1d4F3G-0001y8-9i; Fri, 28 Apr 2017 20:11:50 -0300 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1d4F2n-0007b6-U6 for categories-list@mlist.mta.ca; Fri, 28 Apr 2017 20:11:21 -0300 Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:9198 Archived-At: Dear Michael, Have you looked at the work on acyclic models for crossed complexes in Section 10.4 of the joint book on Nonabelian Algebraic Topology, available from my web page? www.groupoids.or.uk/nonab-a-t.html Crossed complexes do not form an additive category. I do not know a double complex analogue, as in your book, for these ideas. Best Ronnie ----Original message---- >From : barr@math.mcgill.ca Date : 27/04/2017 - 00:11 (GMTDT) To : categories@mta.ca Subject : categories: Simplicial acyclic models Is anyone aware of a non-abelian version of acyclic models that compares simplicial objects (or functors) in a non-additive category? Michael [For admin and other information see: http://www.mta.ca/~cat-dist/ ]