Yusuke OKUYAMA
The Norm Estimates of Pre-Schwarzian Derivatives of Spiral-like Functions
Abstract
For a constant
, a normalized analytic function
on the unit disk is said to be
-spiral-like if
for any point
in the unit disk. In this paper, for such a function
,
we shall present the optimal estimate of the norm of
.
submission: October 30, 1998
revised: September 1, 1999
revised: December 26, 1999
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