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Continued Fractions, Convergence Theory. Vol. 1, 2nd Editions. Loretzen, Waadeland. Atlantis Press. 2008

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26 Chapter 1: Introductory examples<br />

and they are polynomial approximations to √ 1+z −1 for z in the unit disk D :=<br />

{z ∈ C; |z| < 1}. The approximants f n (z) in Example 10 approximate √ 1+z − 1<br />

in a much larger region, D := {z ∈ C; | arg(1 + z)|

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