Re: Logic Problems

*To*: mathgroup at smc.vnet.net*Subject*: [mg2546] Re: Logic Problems*From*: maeder at inf.ethz.ch (Roman Maeder)*Date*: Mon, 20 Nov 1995 01:12:48 -0500*Organization*: Theoretical Computer Science, ETH Zurich

In article <47pnbh$fhc at ralph.vnet.net>, TTCJ34A at prodigy.com (DR JOHN C ERB) wrote: ->Can Mathematica be used to solve logic problems? As a ->simplistic example: Mary is older than Tom; Tom is older ->than Sue; is Mary older than Sue? I would like to be able ->to do this type of problem without specifying values (i.e., ->ageMary=35). ->Thank you. ->John C. Erb It is not that difficult to implement backtracking and unification in Mathematica. I developed a simple Prolog interpreter that could be used to answer such questions. Here are the references: @article{Maeder94c, author = { Roman E. Maeder}, journal = MathJournal, volume = { 4}, number = { 1}, title = {Logic Programming {I}: The Interpreter}, year = 1994 } @article{Maeder94d, author = { Roman E. Maeder}, journal = MathJournal, volume = { 4}, number = { 2}, title = {Logic Programming {II}: Applications}, year = 1994 } the code is in the electronic supplement of the Mathematica Journal. It is available through MathSource. Roman Maeder Theoretical Computer Science ETH Zentrum, IFW 8092 Zurich Switzerland