Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2007
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2007

[Date Index] [Thread Index] [Author Index]

Search the Archive

logical/set theoretic programming

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74024] logical/set theoretic programming
  • From: Christopher Arthur <caa0012 at unt.edu>
  • Date: Tue, 6 Mar 2007 05:32:35 -0500 (EST)

Hello, any suggestions on how to program set theory?
Suppose that I have a notation set up well, and I have a set of rules 
of implication.  The next step is to teach mathemania how to compute...
For example, I define a notation for AbstractComplement[X,A], and I 
want to associate it with it the rule 
Implies[Subset[A,X]&&Element[x,A],!Element[x,AbstractComplement[X,A]].  
In other words, a point can't be in a subset and its complement.  My 
feeling is that alone this rule should be enough to decide the 
falsehood of a statement such as 
Subset[B,W]&&Exists[y,Element[y,B]&&Element[y,AbstractComplement[W,B]]

where in this case i've purposefully changed the variables because i 
don't want to tie the rule to any particular symbols.  How can we set 
up Simplify,Reduce,Refine or something similar to decide on this rule? 
Especially, without having to make the rule explicit in the expression 
to simplify. Christopher Arthur
Student, Mathematics
University of North Texas


  • Prev by Date: Re: Interrupt Service Routines in Mathematica v.5.2?
  • Next by Date: Write a computer program to using Simpson's rule
  • Previous by thread: Re: Simplifying {0,0,0}.X.{0,0,0}
  • Next by thread: Re: logical/set theoretic programming