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Transcendental functions

• To: mathgroup at smc.vnet.net
• Subject: [mg126271] Transcendental functions
• From: David Egan <davee62 at earthlink.net>
• Date: Sat, 28 Apr 2012 05:25:28 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Hi,
I am trying to teach mathematica to recognize this function

  ArcTan[x] - I/2 Log [(I + x)/(I - x)] == 0

Any thoughts on how to force mathematica to use it in simplifications.
Thanks
David

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