Canad. Math. Bull. 51(2008), 195-204
Printed: Jun 2008
We give a necessary and sufficient condition for a composition
operator on an $\alpha$-Bloch space with $\alpha\ge 1$ to be bounded below.
This extends a known result for the Bloch space due to P. Ghatage,
J. Yan, D. Zheng, and H. Chen.
Bloch functions, composition operators
32A18 - Bloch functions, normal functions
30H05 - Bounded analytic functions