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MathGroup Archive 1994

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Specifying rules

  • To: MathGroup at yoda.physics.unc.edu
  • Subject: Specifying rules
  • From: Ron I. Herman <m1rih00 at frb.gov>
  • Date: Fri, 10 Jun 94 16:10:54 -0400

Is there any way to specify rules for symbols?
For example, is there a way to tell Mathematica
that a > 0 and b < 0 such that Positive[a b] will
yield false?

Thanks,
Ron Herman





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