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How to limit a variable to a range?

• To: mathgroup at christensen.cybernetics.net
• Subject: [mg2032] How to limit a variable to a range?
• From: Bernd.Cebulski at e-technik.tu-chemnitz.de (Bernd Cebulski)
• Date: Sat, 16 Sep 1995 01:40:38 -0400
• Organization: TU Chemnitz

Given two variables x and y with 2 different ranges of definition
Say 1<x<2 and 3<y<4. Then for example take a calculation with
these variables perhaps  Min[f1[x],f2[y]]. =


How can I tell MMA to do this. Definitions like
Positive[x-a]=3DTrue don't work. Has anyone an idea
how to solve this task?
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