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- From: pratt@Sunburn.Stanford.EDU (Vaughan R. Pratt)
- Newsgroups: sci.math,sci.physics
- Subject: Re: Three-sided coin
- Message-ID: <1992Nov13.161146.5223@CSD-NewsHost.Stanford.EDU>
- Date: 13 Nov 92 16:11:46 GMT
- References: <11NOV199218361868@utkvx2.utk.edu> <1992Nov12.134111.3793@schaefer.math.wisc.edu> <1992Nov13.065340.28950@CSD-NewsHost.Stanford.EDU>
- Sender: news@CSD-NewsHost.Stanford.EDU
- Organization: Computer Science Department, Stanford University.
- Lines: 15
-
- In article <1992Nov13.065340.28950@CSD-NewsHost.Stanford.EDU> pratt@Sunburn.Stanford.EDU (Vaughan R. Pratt) writes:
- >Here's Joe's simplest construction of a fair n-sided die for n >= 5.
- >Cylindrify (prismify) a regular n-agon.
-
- In an email message to me Peter Hamer turned my own argument (favoring
- 1/sqrt(3) over 1/sqrt(8) as Thickness/Diameter for 1/3 chance of a coin
- landing on edge) about dependence on initial conditions against the
- above. One might say his point was that there ain't no such thing as a
- fair launch.
-
- So here's a die to contradict TANSTAAFL, namely one for which a fair
- launch is easy. For n=6, just take an ordinary lead pencil. This
- generalizes readily to n >= 3.
- --
- Vaughan Pratt A fallacy is worth a thousand steps.
-