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ComplexExpand (V4.0)

• To: mathgroup at smc.vnet.net
• Subject: [mg20318] ComplexExpand (V4.0)
• From: Blimbaum Jerry DLPC <BlimbaumJE at ncsc.navy.mil>
• Date: Fri, 15 Oct 1999 20:20:45 -0400
• Sender: owner-wri-mathgroup at wolfram.com

	Why does ComplexExpand[Re[1/(x + I y)]]   return

	x/Abs[x+ I y]^2   

	rather then      	x/(x^2+y^2)

	The Mathematica manual says that ComplexExpand assumes that the
variables are real.

	thanks.   jerry blimbaum    NSWC  Panama City, Fl