Singularities/Residues/Applications 757
where
0 ::=; Argwl/m < 27r/m
How~ver, to w = 0 'there corresponds only one inverse image, namely,
z = 0.
Exercise 9.10
Find the largest neighborhood of the origin where w = f(z) = z^2 + z is
one-to-one. Express z = f-^1 (w) in terms of a series in powers of w.
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