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Article 1855 of comp.ai.philosophy:
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>From: litow@csd4.csd.uwm.edu (Bruce E Litow)
Subject: Re: Physical limits when programming neurons and minds
Message-ID: <1991Dec4.170040.8497@uwm.edu>
Followup-To: n-body computability
Sender: B. Litow
Organization: Computing Services Division, University of Wisconsin - Milwaukee
References: <2140@ucl-cs.uucp>
Date: Wed, 4 Dec 1991 17:00:40 GMT
Lines: 20

I have the impression that at least first collision (including triple
collision) can be computed for the 3-body problem (classical) via
Sundman's work, ca. 1912. This is described in Celestial Mechanics by
Moser and Siegel. I also have the impression that a reasonable 
qualitative characterization of the motion for the general 3-body
problem, i.e. parameterized by "neighborhood of initial conditions" is
hopeless. I do not know if the 5 or perhaps 4 body problem, say w.r.t.
collisions, is non-computable.


Bruce Litow
Computing Services Division
P.O. Box 413
Univ. Wisconsin-Milwaukee, Milwaukee, WI, 53201
litow@convex.csd.uwm.edu
-- 
Bruce Litow
Computing Services Division
P.O.Box 413, University of Wisconsin-Milwaukee, 53201
414 229 6431    litow@csd4.csd.uwm.edu


