From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/9022 Path: news.gmane.org!.POSTED!not-for-mail From: Thomas Streicher Newsgroups: gmane.science.mathematics.categories Subject: Re: Giraud_Elementary_? Date: Tue, 8 Nov 2016 11:03:59 +0100 Message-ID: References: Reply-To: Thomas Streicher NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: blaine.gmane.org 1478651575 22423 195.159.176.226 (9 Nov 2016 00:32:55 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 9 Nov 2016 00:32:55 +0000 (UTC) Cc: Categories list To: Eduardo Julio Dubuc Original-X-From: majordomo@mlist.mta.ca Wed Nov 09 01:32:49 2016 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtp3.mta.ca ([138.73.7.28]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1c4Goj-00045u-1E for gsmc-categories@m.gmane.org; Wed, 09 Nov 2016 01:32:41 +0100 Original-Received: from mlist.mta.ca ([138.73.1.63]:42519) by smtp3.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1c4Go0-0006KN-NR; Tue, 08 Nov 2016 20:31:56 -0400 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1c4Go2-0004dE-BM for categories-list@mlist.mta.ca; Tue, 08 Nov 2016 20:31:58 -0400 Content-Disposition: inline In-Reply-To: Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:9022 Archived-At: On Mon, Nov 07, 2016 at 04:03:18PM -0500, Eduardo Julio Dubuc wrote: > Hi, in this posting I will use the terminology used by most people in > the list. > > There are Grothendieck, Giraud and Elementary (Lawvere-Tierney) topos. > > Grothendieck are Giraud and Elementary, my question is: > > Are Elementary Giraud topos which are not Grothendieck ? But Grothendieck and Giraud toposes are the same. In the Elephant one can even find a relative Giraud Theorem. Thomas [For admin and other information see: http://www.mta.ca/~cat-dist/ ]