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Article #2486Re: "Cut & Choose" for several players
From: Denis Howe
Date: Mon, 25 Jan 1993 16:08
Date: Mon, 25 Jan 1993 16:08
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1886 bytes
In article <727745474snz@panache.demon.co.uk> raph@panache.demon.co.uk (Raphael Mankin) wrote: >The general rule is that the player who divides does not choose. >This negative feedback prevents bias in the divisions -- assuming >that there are no collusions. A Byznatine generals' solution would >be much more complex. A what? What's a Byznatine (or even Byzantine) generals' solution? >Player 1 divides the pile into a 1-portion and a (n-1)-portion. >Player 2 decides whether he or player 1 gets the 1-portion. Whoever >gets it drops out. The division continues with n-1 players and the >(n-1)-portion. That ensures that each person is satisfied with his own share but the new version of the problem requires that each person be satisfied that nobody else has a better portion. Player 3 may think that the 1-portion was too big but he has no chance to object according to the above algorithm. I believe the problem is insoluble because anyone who is not involved in making a division can always veto it. There is thus no incremental approach which successively excludes people from the decision making. This means that everyone must simultaneously agree to all divisions but that is just a restatement of the problem. -- Denis Howe <dbh@doc.ic.ac.uk> Who is the potter and who the pot?
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Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!doc.ic.ac.uk!news!dbh From: dbh@doc.ic.ac.uk (Denis Howe) Newsgroups: rec.puzzles,sci.math,rec.games.misc Subject: Re: "Cut & Choose" for several players Date: 25 Jan 93 16:08:22 Organization: Computing Department, Imperial College, London, UK Lines: 30 Distribution: world Message-ID: <DBH.93Jan25160822@wombat.doc.ic.ac.uk> References: <43755@sdcc12.ucsd.edu> <727745474snz@panache.demon.co.uk> NNTP-Posting-Host: wombat.doc.ic.ac.uk In-reply-to: raph@panache.demon.co.uk's message of Fri, 22 Jan 1993 23:31:14 +0000