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How do I assign a variable to be a real positive number ?

• To: mathgroup at smc.vnet.net
• Subject: [mg32318] How do I assign a variable to be a real positive number ?
• From: klepachd at yahoo.com (Doron)
• Date: Sat, 12 Jan 2002 21:32:37 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

Hello ,
I am trying to assign w to be a real positive number ,
so that Abs[w] will be = w .
Thank you for your help .