Re: O(1) in Mathematica

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

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 <fayard.prof at gmail.com> wrote: ============= Hello, 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. Thanks, Fran=E7ois