From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/8236 Path: news.gmane.org!not-for-mail From: Ondrej Rypacek Newsgroups: gmane.science.mathematics.categories Subject: Re: Limits in REL Date: Fri, 25 Jul 2014 13:51:11 +0100 Message-ID: References: Reply-To: Ondrej Rypacek NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: ger.gmane.org 1406340620 3348 80.91.229.3 (26 Jul 2014 02:10:20 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 26 Jul 2014 02:10:20 +0000 (UTC) To: "categories@mta.ca" Original-X-From: majordomo@mlist.mta.ca Sat Jul 26 04:10:14 2014 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtp3.mta.ca ([138.73.1.186]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XArR3-0004DY-Eg for gsmc-categories@m.gmane.org; Sat, 26 Jul 2014 04:10:09 +0200 Original-Received: from mlist.mta.ca ([138.73.1.63]:48335) by smtp3.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1XArQa-0005g6-Q3; Fri, 25 Jul 2014 23:09:40 -0300 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1XArQb-0007If-Dm for categories-list@mlist.mta.ca; Fri, 25 Jul 2014 23:09:41 -0300 In-Reply-To: Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:8236 Archived-At: Dear all, as promised this and the previous similar thread has now been compiled at http://ncatlab.org/nlab/show/Rel. Please feel free to review and amend as you seem fit. Thank you all for your answers! Ondrej On 7 July 2014 11:03, Ondrej Rypacek wrote: > Thank you everyone for your time in answering my question. It has been > most helpful! > > Following Bas Spitters's suggestion, and because this was the second > time someone asked exactly the same question in a short period of > time, I'm going to compile a digest for > http://ncatlab.org/nlab/show/Rel soon. > > Thanks, > Ondrej > > >> >> On 3 July 2014 11:57, Ondrej Rypacek wrote: >> >>> Hi all >>> >>> What is known about limits in REL , the (bi)category of sets and relations? >>> I know there are biproducts; are there equalisers? >>> >>> And what about SPAN(C) or REL(C), spans and relations over a suitable >>> category C ? >>> >>> Thanks a lot in advance, >>> Ondrej >>> [For admin and other information see: http://www.mta.ca/~cat-dist/ ]