Article View: comp.lang.misc
Article #2056Re: Array references cannot be made optimal
From: David Gudeman
Date: Wed, 14 Nov 1990 15:16
Date: Wed, 14 Nov 1990 15:16
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In article <3975:Nov1323:25:4390@kramden.acf.nyu.edu> Dan Bernstein writes: ]Here are two articles about the practical solution to the halting ]problem... This isn't a solution to the halting problem, it's a solution to the problem of determining whether a program ever enters the same state twice --which is neither a sufficient nor necessary condition for a program to be non-terminating. That, unless you include the entire universe of things that might effect the program in the state (input futures and such). In that case it is a sufficient but still not necessary condition for non-termination. You could probably get a better approximate solution by a static analysis of the program, and it would not effect run-time parameters. -- David Gudeman Department of Computer Science The University of Arizona gudeman@cs.arizona.edu Tucson, AZ 85721 noao!arizona!gudeman
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!ncar!noao!arizona!gudeman From: gudeman@cs.arizona.edu (David Gudeman) Newsgroups: comp.lang.misc Subject: Re: Array references cannot be made optimal Message-ID: <27477@megaron.cs.arizona.edu> Date: 14 Nov 90 15:16:50 GMT Organization: U of Arizona CS Dept, Tucson Lines: 19