From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/6712 Path: news.gmane.org!not-for-mail From: Jeremy Gibbons Newsgroups: gmane.science.mathematics.categories Subject: Re: Lawvere on probability distributions as a monad Date: Mon, 13 Jun 2011 22:28:31 +0100 Message-ID: References: Reply-To: Jeremy Gibbons NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable X-Trace: dough.gmane.org 1308400585 11385 80.91.229.12 (18 Jun 2011 12:36:25 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sat, 18 Jun 2011 12:36:25 +0000 (UTC) To: Categories mailing list Original-X-From: majordomo@mlist.mta.ca Sat Jun 18 14:36:21 2011 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtpx.mta.ca ([138.73.1.30]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QXulB-0001Gb-36 for gsmc-categories@m.gmane.org; Sat, 18 Jun 2011 14:36:21 +0200 Original-Received: from mlist.mta.ca ([138.73.1.63]:49682) by smtpx.mta.ca with esmtp (Exim 4.71) (envelope-from ) id 1QXujE-0003nr-MV; Sat, 18 Jun 2011 09:34:20 -0300 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1QXujD-000335-SX for categories-list@mlist.mta.ca; Sat, 18 Jun 2011 09:34:19 -0300 In-Reply-To: Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:6712 Archived-At: Dear all, I sent the following request a few months ago, looking for a "preprint" = of Lawvere's from 1962. I'm not the only one interested - I got five = replies, off-list, of the form "If you find it, could I have a copy too, = please?"=20 I thought I would try one last time. My paper that cites this has been = accepted for publication, and I'm doing due diligence by trying my best = to track down original sources! Does anyone know where I can find a copy? Thanks again, Jeremy On 22 Feb 2011, at 14:08, Jeremy Gibbons wrote: > I wonder if you fine categorists could help me track down an old > preprint? >=20 > Many people have written about probability distributions forming a > monad (and so probabilistic computations can be captured as a > "computational effect"). The reference trail goes back to >=20 > Michele Giry, "A Categorical Approach to Probability Theory", LNM > 915:68-85, 1981 >=20 > and thence to >=20 > F W Lawvere, "The Category of Probabilistic Mappings", preprint, = 1962 >=20 > I have Giry's paper, but can find no trace on the web of Lawvere's > preprint. Does anyone know where I might find a copy? Might someone > even have a copy that they would be prepared to scan? >=20 > Thanks, > Jeremy Jeremy.Gibbons@cs.ox.ac.uk Oxford University Department of Computer Science, Wolfson Building, Parks Road, Oxford OX1 3QD, UK. +44 1865 283521 http://www.cs.ox.ac.uk/people/jeremy.gibbons/ [For admin and other information see: http://www.mta.ca/~cat-dist/ ]