From: Robert Dawson <rdawson@cs.smu.ca>
To: Patrik Eklund <peklund@cs.umu.se>, cat group <categories@mta.ca>
Subject: Re: The boringness of the dual of exponential
Date: Tue, 15 Nov 2011 09:03:40 -0400 [thread overview]
Message-ID: <E1RQfp1-0001zQ-HA@mlist.mta.ca> (raw)
In-Reply-To: <Pine.GSO.4.64.1111141411250.28866@peppar.cs.umu.se>
On 14/11/2011 9:36 AM, Patrik Eklund wrote:
> Dear Vaughan,
>
> An excellent remark, once again from your side.
>
> The general audience of this remark may, however, not identify the
> subtlety of these states with respect to modelling of parallel programs
> and what apparently now happens on clouds and grids with services and
> brokers, and not even to mention customers using these services.
>
> So perhaps I may suggest to recall e.g. the dining philosophers
> paradigm, which was widely used during the early days of CSP
> (Communicating Sequential Processes) decades ago. The philosophers go
> through only three states, namely, thinking, getting hungry (and thereby
> stop thinking), and eating. After eating then go back to thinking, and so
> on. They use chopsticks, one by one (in a very non-Asian fashion), and
> communicate about using these resources with fellow philosophers around
> the table. Simple objectives are e.g. to avoid starvation.
My recollection was that there were two versions - "dining
philosophers" who had shared access to two forks, either one of which
sufficed; and "dining Chinese philosophers" who had shared access to two
chopsticks of which both were needed.
But perhaps I have got it wrong?
Robert
[For admin and other information see: http://www.mta.ca/~cat-dist/ ]
next prev parent reply other threads:[~2011-11-15 13:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-05 12:52 David Leduc
2011-11-06 20:22 ` FEJ Linton
2011-11-06 21:55 ` Thomas Streicher
2011-11-07 16:32 ` F. William Lawvere
2011-11-06 22:59 ` Ross Street
[not found] ` <F284B070-BBE5-4187-BA3C-E1A3EA560E6A@mq.edu.au>
2011-11-07 12:52 ` David Leduc
2011-11-08 16:20 ` Paul Taylor
2011-11-09 20:57 ` Uwe.Wolter
2011-11-10 9:29 ` Prof. Peter Johnstone
2011-11-11 7:47 ` Vaughan Pratt
2011-11-11 21:08 ` Robert Seely
2011-11-09 11:28 ` Andrej Bauer
2011-11-10 0:45 ` Jocelyn Ireson-Paine
2011-11-13 7:57 ` Vaughan Pratt
2011-11-14 13:36 ` Patrik Eklund
2011-11-15 13:03 ` Robert Dawson [this message]
[not found] ` <07D33522-CA8F-4133-A8E8-4B3BF6DFCCB4@cs.ox.ac.uk>
2011-11-16 18:06 ` Robert Dawson
2011-11-10 2:17 ` Peter Selinger
2011-11-07 21:23 ` Michael Shulman
2011-11-10 1:11 ` Andrej Bauer
2011-11-09 9:19 Reinhard Boerger
2011-11-09 18:58 RJ Wood
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