Conditions For Univalence
If f(z) is a holomorphic function on the unit disc |z| < 1, then W. Kraus (1932) and Nehari (1949) proved that a necessary condition for f to be univalent is
Conversely if f(z) is a holomorphic function on the unit disc satisfying
then Nehari proved that f is univalent.
In particular a sufficient condition for univalence is
Read more about this topic: Schwarzian Derivative
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