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- 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
-
- 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?
-