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Derivative of g(z) = Arg(z) and f(z) = Re(z) + Im(z)?

• To: mathgroup at smc.vnet.net
• Subject: [mg54093] Derivative of g(z) = Arg(z) and f(z) = Re(z) + Im(z)?
• From: MarieKaasi at hotmail.com (Marie)
• Date: Thu, 10 Feb 2005 02:46:45 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

How do I solve a derivative of a complex function Arg(z) or Re(z) +
Im(z) by definition? (f(z) - f(w))/(z-w) -> f'(w) as z->w...