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Compute ArcTan(n Pi+ Pi/2 + O(1))

  • To: mathgroup at smc.vnet.net
  • Subject: [mg95808] Compute ArcTan(n Pi+ Pi/2 + O(1))
  • From: Francois at news.free.fr, Fayard at news.free.fr
  • Date: Wed, 28 Jan 2009 06:27:08 -0500 (EST)

Hello,

I'm new to Mathematica and I want to compute a serie expantion of

ArcTan(n Pi + Pi/2 + O(1))   (The O is a big O and is taken when n goes
to Infinity)

I dont know how to input O(1) in Mathematica. For example
O[n,Infinity]^0 simplifies to 1 which is not what I want.

Thanks for the help.
Francois



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