From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/1862 Path: news.gmane.org!not-for-mail From: Peter Freyd Newsgroups: gmane.science.mathematics.categories Subject: Which is the simplest example? Date: Fri, 16 Feb 2001 08:43:56 -0500 (EST) Message-ID: <200102161343.f1GDhuo24693@saul.cis.upenn.edu> NNTP-Posting-Host: main.gmane.org X-Trace: ger.gmane.org 1241018158 858 80.91.229.2 (29 Apr 2009 15:15:58 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Apr 2009 15:15:58 +0000 (UTC) To: categories@mta.ca Original-X-From: rrosebru@mta.ca Fri Feb 16 13:49:16 2001 -0400 Return-Path: Original-Received: (from Majordom@localhost) by mailserv.mta.ca (8.11.1/8.11.1) id f1GHJGk31009 for categories-list; Fri, 16 Feb 2001 13:19:16 -0400 (AST) X-Authentication-Warning: mailserv.mta.ca: Majordom set sender to cat-dist@mta.ca using -f Original-Sender: cat-dist@mta.ca Precedence: bulk X-Keywords: X-UID: 44 Original-Lines: 4 Xref: news.gmane.org gmane.science.mathematics.categories:1862 Archived-At: I said that the simplest example of a category with pullbacks but not products is the discrete category with two objects. Come to think of it, any category with exactly two morphisms is an example.