From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/7134 Path: news.gmane.org!not-for-mail From: "Prof. Peter Johnstone" Newsgroups: gmane.science.mathematics.categories Subject: Re: Name for not-quite-additive categories Date: Sat, 7 Jan 2012 11:29:54 +0000 (GMT) Message-ID: References: Reply-To: "Prof. Peter Johnstone" NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Trace: dough.gmane.org 1325945768 28136 80.91.229.12 (7 Jan 2012 14:16:08 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sat, 7 Jan 2012 14:16:08 +0000 (UTC) Cc: Categories list To: Michael Barr Original-X-From: majordomo@mlist.mta.ca Sat Jan 07 15:16:04 2012 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtpx.mta.ca ([138.73.1.4]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1RjX3z-0006Xr-OH for gsmc-categories@m.gmane.org; Sat, 07 Jan 2012 15:16:03 +0100 Original-Received: from mlist.mta.ca ([138.73.1.63]:40761) by smtpx.mta.ca with esmtp (Exim 4.77) (envelope-from ) id 1RjX2n-00032E-6Y; Sat, 07 Jan 2012 10:14:49 -0400 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1RjX2m-00079f-Qm for categories-list@mlist.mta.ca; Sat, 07 Jan 2012 10:14:48 -0400 In-Reply-To: Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:7134 Archived-At: "Semi-additive" seems a good enough name to me. Peter Johnstone On Fri, 6 Jan 2012, Michael Barr wrote: > Has anyone settled on a term to describe categories (such as commutative > monoids) in which finite sums and products coincide but are not quite > additive? I guess they are commutative monoid enriched. > > Michael > > -- > Any society that would give up a little liberty to gain a little > security will deserve neither and lose both. > > Benjamin Franklin [For admin and other information see: http://www.mta.ca/~cat-dist/ ]