From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/2256 Path: news.gmane.org!not-for-mail From: Michael Barr Newsgroups: gmane.science.mathematics.categories Subject: re: Equivalent varieties Date: Sun, 27 Apr 2003 09:19:31 -0400 (EDT) Message-ID: NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Trace: ger.gmane.org 1241018529 3272 80.91.229.2 (29 Apr 2009 15:22:09 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Apr 2009 15:22:09 +0000 (UTC) To: Categories list Original-X-From: rrosebru@mta.ca Sun Apr 27 15:46:38 2003 -0300 Return-path: Envelope-to: categories-list@mta.ca Delivery-date: Sun, 27 Apr 2003 15:46:38 -0300 Original-Received: from Majordom by mailserv.mta.ca with local (Exim 4.10) id 199r97-00042K-00 for categories-list@mta.ca; Sun, 27 Apr 2003 15:45:05 -0300 X-Authentication-Warning: triples.math.mcgill.ca: barr owned process doing -bs X-Sender: barr@triples.math.mcgill.ca Original-Sender: cat-dist@mta.ca Precedence: bulk X-Keywords: X-UID: 29 Original-Lines: 8 Xref: news.gmane.org gmane.science.mathematics.categories:2256 Archived-At: To expand on what I said about equivalent varieties, a French mathematician named Batbedat showed many years ago that for any prime p, the category of p-rings (a p-ring satisfies px = 0 and x^p = x) is equivalent to the category of 2-rings, that is boolean rings.