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MathGroup Archive 2000

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bug in InequalitySolve version 3?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg23554] bug in InequalitySolve version 3?
  • From: Gianluca Gorni <gorni at dimi.uniud.it>
  • Date: Sat, 20 May 2000 03:10:29 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello!

I wrote a program that works fine in version 4, using InequalitySolve
to solve systems of linear inequalities,
and wanted to adapt it for use of a student who
has only access to version 3.

I ran into unexpected problems. Take this example:

($Version="Solaris 3.0 (August 21, 1997)")

  Needs["Algebra`InequalitySolve`"]

  InequalitySolve[(y > 0) && (y < 1), {x, y}]

This command gives back the input and produces 3 messages,
one of which is funny:

InequalitySolve::"nlin": "\!\(\(y > 0\) && \(y < 1\)\) is not a formula \
constructed with linear equations and inequalities in \!\({x, y}\)."

Is this a bug? Can I forget about using InequalitySolve v.3?

            Gianluca Gorni

-- 


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 | Gianluca Gorni                  |
 | Universita` di Udine            |
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