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Re: O(1) in Mathematica

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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