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Defining a function

• To: mathgroup at smc.vnet.net
• Subject: [mg28572] Defining a function
• From: yarblocks at yahoo.de (Jesse Marder)
• Date: Sat, 28 Apr 2001 21:35:59 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Hello.

I have for example:

a = x + y and
b = x*y

whats the procedure to express b as a function of a in Mathematica?

Thank you.
Jesse.