From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/9251 Path: news.gmane.org!.POSTED!not-for-mail From: Michael Barr Newsgroups: gmane.science.mathematics.categories Subject: Is there a standard name? Date: Fri, 30 Jun 2017 19:29:01 -0400 (EDT) Message-ID: Reply-To: Michael Barr 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 1499090617 13920 195.159.176.226 (3 Jul 2017 14:03:37 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 3 Jul 2017 14:03:37 +0000 (UTC) To: "Categories list\" " Original-X-From: majordomo@mlist.mta.ca Mon Jul 03 16:03:27 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 1dS1we-0002nA-R6 for gsmc-categories@m.gmane.org; Mon, 03 Jul 2017 16:03:20 +0200 Original-Received: from mlist.mta.ca ([138.73.1.63]:49919) by smtp2.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1dS1s9-0007Ml-QP; Mon, 03 Jul 2017 10:58:41 -0300 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1dS1qi-0003vd-08 for categories-list@mlist.mta.ca; Mon, 03 Jul 2017 10:57:12 -0300 Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:9251 Archived-At: It is well known that the homotopy relation on maps of simplicial sets is not symmetric nor transitive (it is reflexive). Is there a standard name for its symmetric, reflexive closure. I have been calling it wide homotopy, but I don't want to introduce a new term if there is a standard one. Michael [For admin and other information see: http://www.mta.ca/~cat-dist/ ]