From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/9021 Path: news.gmane.org!.POSTED!not-for-mail From: Eduardo Julio Dubuc Newsgroups: gmane.science.mathematics.categories Subject: Giraud_Elementary_? Date: Mon, 7 Nov 2016 16:03:18 -0500 Message-ID: Reply-To: Eduardo Julio Dubuc NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1478569436 26516 195.159.176.226 (8 Nov 2016 01:43:56 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 8 Nov 2016 01:43:56 +0000 (UTC) To: Categories list Original-X-From: majordomo@mlist.mta.ca Tue Nov 08 02:43:52 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 1c3vRq-0004bO-Fo for gsmc-categories@m.gmane.org; Tue, 08 Nov 2016 02:43:38 +0100 Original-Received: from mlist.mta.ca ([138.73.1.63]:40498) by smtp3.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1c3vRR-0002Wr-QG; Mon, 07 Nov 2016 21:43:13 -0400 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1c3vRS-0003x7-0b for categories-list@mlist.mta.ca; Mon, 07 Nov 2016 21:43:14 -0400 Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:9021 Archived-At: 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 ? Examples ? greetings e.d. [For admin and other information see: http://www.mta.ca/~cat-dist/ ]