From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/6089 Path: news.gmane.org!not-for-mail From: Jocelyn Paine Newsgroups: gmane.science.mathematics.categories Subject: Category-theory demonstrations on the Web Date: Thu, 2 Sep 2010 05:43:37 +0100 (BST) Message-ID: Reply-To: Jocelyn Paine NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII X-Trace: dough.gmane.org 1283432884 9350 80.91.229.12 (2 Sep 2010 13:08:04 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 2 Sep 2010 13:08:04 +0000 (UTC) To: Categories Original-X-From: majordomo@mlist.mta.ca Thu Sep 02 15:08:03 2010 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtpy.mta.ca ([138.73.1.139]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Or9WN-00014O-3I for gsmc-categories@m.gmane.org; Thu, 02 Sep 2010 15:08:03 +0200 Original-Received: from mlist.mta.ca ([138.73.1.63]:50031) by smtpy.mta.ca with esmtp (Exim 4.71) (envelope-from ) id 1Or9VR-0005Fp-Fv; Thu, 02 Sep 2010 10:07:05 -0300 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1Or9VN-000361-F0 for categories-list@mlist.mta.ca; Thu, 02 Sep 2010 10:07:01 -0300 Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:6089 Archived-At: This is to tell, or remind, readers about the Web-based interactive category-theory demonstrations I have on my site. Perhaps of interest to new students now an academic year is starting. They're at http://www.j-paine.org/cgi-bin/webcats/webcats.php . After some preamble, this page contains a form divided into sections. Each section generates a particular construct in the category of finite sets: e.g. a colimit, equaliser, or initial object. You can input sets and arrows, or let the demo choose its own. The output includes a diagram, and text explaining it. Cheers, Jocelyn Paine http://www.j-paine.org +44 (0)7768 534 091 Jocelyn's Cartoons: http://www.j-paine.org/blog/jocelyns_cartoons/ [For admin and other information see: http://www.mta.ca/~cat-dist/ ]