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Re: O(1) in Mathematica

  • To: mathgroup at
  • Subject: [mg95925] Re: [mg95823] O(1) in Mathematica
  • From: Bob Hanlon <hanlonr at>
  • Date: Thu, 29 Jan 2009 06:01:52 -0500 (EST)
  • Reply-to: hanlonr at

Is this what you want?

Series[ArcTan[1/(n + d)], {d, 0, 1}] // Normal

ArcTan[1/n] - d/(n^2 + 1)

Bob Hanlon

---- Francois Fayard < at> wrote: 


I'd like to compute ArcTan[1/(n+O(1))] but I don't know how to enter
O(1) with Mathematica as O[n,Infinity]^0 simplifies to 1 which is not
what I want.


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