From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/5737 Path: news.gmane.org!not-for-mail From: Michael Barr Newsgroups: gmane.science.mathematics.categories Subject: Infinitary operations on C(X) Date: Mon, 3 May 2010 15:18:57 -0400 (EDT) Message-ID: Reply-To: Michael Barr NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Trace: dough.gmane.org 1272938999 18040 80.91.229.12 (4 May 2010 02:09:59 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 4 May 2010 02:09:59 +0000 (UTC) To: Categories list Original-X-From: categories@mta.ca Tue May 04 04:09:58 2010 connect(): No such file or directory Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from mailserv.mta.ca ([138.73.1.1]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1O97a9-00069S-VF for gsmc-categories@m.gmane.org; Tue, 04 May 2010 04:09:58 +0200 Original-Received: from Majordom by mailserv.mta.ca with local (Exim 4.61) (envelope-from ) id 1O977Y-0002ve-Q2 for categories-list@mta.ca; Mon, 03 May 2010 22:40:24 -0300 Original-Sender: categories@mta.ca Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:5737 Archived-At: Way back, John Isbell told me that the theory of C*-algebras could be dnoe with a batch of finitary operations such as convex sum, product, and maybe others plus exactly one omega-ary operation that takes {x_i} to \sum 2^{-i}x_i. Does anyone know if John ever published this and where? Michael [For admin and other information see: http://www.mta.ca/~cat-dist/ ]