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Article #414Re: Re: Clicking on Irregular Shapes (and the four color problem)
From: Chuck Hacala
Date: Fri, 07 Jul 1989 00:25
Date: Fri, 07 Jul 1989 00:25
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> ... However, it really isn't very useful for the problem > at hand. Most geographical maps are *not* maps in the mathematical sense. > For instance, you can't color a map of the US with four colors. > > -Dan Riley (riley@tcgould.tn.cornell.edu, cornell!batcomputer!riley) > -Wilson Lab, Cornell U. Why not? I'm sure I've seen maps of the US with only four colors. What makes a US map not a map in the mathematical sense? The four-color theorem has always been one of my favorites, and it required the use of a computer to prove it. I believe they reduced the theorem down to a finite, but large, number of cases which were then checked individually by a computer. Perhaps it was even an Amiga! :-)
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!apple!motcsd!hpda!hpcupt1!hpindwa!chuckh From: chuckh@hpindwa.HP.COM (Chuck Hacala) Newsgroups: comp.sys.amiga.tech Subject: Re: Re: Clicking on Irregular Shapes (and the four color problem) Message-ID: <36590001@hpindwa.HP.COM> Date: 7 Jul 89 00:25:12 GMT References: <8325@batcomputer.tn.cornell.edu> Organization: Hewlett-Packard, Cupertino CA Lines: 13