From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/9024 Path: news.gmane.org!.POSTED!not-for-mail From: Eduardo Julio Dubuc Newsgroups: gmane.science.mathematics.categories Subject: Re: Giraud_Elementary_? Date: Tue, 8 Nov 2016 12:20:25 -0500 Message-ID: References: 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 1478651663 31801 195.159.176.226 (9 Nov 2016 00:34:23 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 9 Nov 2016 00:34:23 +0000 (UTC) Cc: Categories list To: Daniil Frumin Original-X-From: majordomo@mlist.mta.ca Wed Nov 09 01:34:18 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 1c4GqA-0006hy-9m for gsmc-categories@m.gmane.org; Wed, 09 Nov 2016 01:34:10 +0100 Original-Received: from mlist.mta.ca ([138.73.1.63]:42531) by smtp3.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1c4Gpl-0006bO-H2; Tue, 08 Nov 2016 20:33:45 -0400 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1c4Gpn-0004fo-9Y for categories-list@mlist.mta.ca; Tue, 08 Nov 2016 20:33:47 -0400 In-Reply-To: Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:9024 Archived-At: By Giraud topos I mean all the assumptions in Giraud's theorem, exept a small set of generators. What Grothendieck call "faux topos". See SGA4 Exposse IV Theoreme 1.2 (Giraud's theorem) and Example 2.8 (faux topos). best e.d. I guess I was wrong when I thought that "Giraud Topos" was established terminology in the cat-list. On 11/8/16 09:59, Daniil Frumin wrote: > What is actually a Giraud topos? I cannot find a reference for this on > the internet. > > On Mon, Nov 7, 2016 at 10:03 PM, 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 ? > > Examples ? > > greetings e.d. > > > [For admin and other information see: http://www.mta.ca/~cat-dist/ ] > > [For admin and other information see: http://www.mta.ca/~cat-dist/ ]