From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/6931 Path: news.gmane.org!not-for-mail From: David Roberts Newsgroups: gmane.science.mathematics.categories Subject: Re: Reference requested Date: Fri, 30 Sep 2011 17:08:06 +0930 Message-ID: References: Reply-To: David Roberts NNTP-Posting-Host: lo.gmane.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: dough.gmane.org 1317409088 25732 80.91.229.12 (30 Sep 2011 18:58:08 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 30 Sep 2011 18:58:08 +0000 (UTC) To: "categories@mta.ca list" Original-X-From: majordomo@mlist.mta.ca Fri Sep 30 20:58:04 2011 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtpx.mta.ca ([138.73.1.30]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1R9iHb-0007RQ-5c for gsmc-categories@m.gmane.org; Fri, 30 Sep 2011 20:58:03 +0200 Original-Received: from mlist.mta.ca ([138.73.1.63]:37513) by smtpx.mta.ca with esmtp (Exim 4.76) (envelope-from ) id 1R9iGG-0005ED-OX; Fri, 30 Sep 2011 15:56:40 -0300 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1R9iGF-0002BN-5r for categories-list@mlist.mta.ca; Fri, 30 Sep 2011 15:56:39 -0300 Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:6931 Archived-At: Or codiscrete groupoid? David On 29 September 2011 23:11, Ronnie Brown wrote: > Why not use the term `indiscrete groupoid' for the functor that gives a > right adjoint to the =C2=A0functor Ob: Groupoids \to Sets? =C2=A0 The lef= t adjoint > is then of course the `discrete groupoid'. =C2=A0This agrees with the > terminology for discrete and indiscrete topologies. > > I confess to have used different =C2=A0terminology in various places. > > Of course one use of these notions is to show that the functor Ob > preserves limits and colimits, which is =C2=A0a start on constructing the= m. ... [For admin and other information see: http://www.mta.ca/~cat-dist/ ]