From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/10233 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Newsgroups: gmane.science.mathematics.categories Subject: locales such that the associated topos is subdiscrete? Date: Mon, 8 Jun 2020 20:26:06 +0200 Message-ID: Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="99902"; mail-complaints-to="usenet@ciao.gmane.io" To: Original-X-From: majordomo@rr.mta.ca Tue Jun 09 02:21:48 2020 Return-path: Envelope-to: gsmc-categories@m.gmane-mx.org Original-Received: from smtp2.mta.ca ([198.164.44.55]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jiS1T-000PqW-Mx for gsmc-categories@m.gmane-mx.org; Tue, 09 Jun 2020 02:21:47 +0200 Original-Received: from rr.mta.ca ([198.164.44.159]:55998) by smtp2.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1jiS11-0008U8-RX; Mon, 08 Jun 2020 21:21:19 -0300 Original-Received: from majordomo by rr.mta.ca with local (Exim 4.92.1) (envelope-from ) id 1jiS0n-0000ZO-8P for categories-list@rr.mta.ca; Mon, 08 Jun 2020 21:21:05 -0300 Precedence: bulk Xref: news.gmane.io gmane.science.mathematics.categories:10233 Archived-At: Toposes Sh(B) of sheaves over a cBa B have the property that every object appears as sum of subterminals. Does any one know a more elementary characterization of those cHa's A such that every object of Sh(A) appears as sum of subterminals? Maybe it is precisely the cBa's but I do not see how to prove it... Thomas [For admin and other information see: http://www.mta.ca/~cat-dist/ ]