Abstract
We study composition-differentiation operators on the Hardy space H 1 on the unit disk. We prove that if φ is an analytic self-map of the unit disk such that the composition-differentiation operator induced by φ is bounded on the Hardy space H 1 , then it is completely continuous. This result is stronger than the similar result for composition operators which says that the composition operator induced by φ is completely continuous if and only if φ e i θ < 1 almost everywhere on the unit circle.
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