From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/1952 Path: news.gmane.org!not-for-mail From: jim stasheff Newsgroups: gmane.science.mathematics.categories Subject: Re: Limits Date: Sat, 05 May 2001 14:58:34 -0400 Message-ID: <3AF44D5A.7D18BA9C@email.unc.edu> References: <200105021702.f42H2aT18744@saul.cis.upenn.edu> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1241018228 1369 80.91.229.2 (29 Apr 2009 15:17:08 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Apr 2009 15:17:08 +0000 (UTC) To: categories@mta.ca Original-X-From: rrosebru@mta.ca Sat May 5 18:19:20 2001 -0300 Return-Path: Original-Received: (from Majordom@localhost) by mailserv.mta.ca (8.11.1/8.11.1) id f45KULh13721 for categories-list; Sat, 5 May 2001 17:30:21 -0300 (ADT) X-Authentication-Warning: mailserv.mta.ca: Majordom set sender to cat-dist@mta.ca using -f X-Mailer: Mozilla 4.7 [en] (WinNT; I) X-Accept-Language: en Original-Sender: cat-dist@mta.ca Precedence: bulk X-Keywords: X-UID: 20 Original-Lines: 14 Xref: news.gmane.org gmane.science.mathematics.categories:1952 Archived-At: The category of finite sets and isomorphisms versus the category with objects 1,2,...,n,... and the symmetric groups \Sigma_n as morphisms The category of `modules' over one is equivalent to The category of `modules' over the other Is this somewhere in the literature or just folk lore? Maybe for one n at a time?? thanks jim