Document Type

Article

Publication Date

2012

Publication Title

Rocky Mountain Journal of Mathematics

Volume

42

Issue

1

First Page

235

Last Page

249

Abstract

Operators on function paces acting by composition to the right with a fixed self-map φ of some set are called composition operators with the symbol φ. In this paper, composition operators on the Hilbert Hardy space over the unit disk are considered. The numerical ranges of composition operators with inner symbol of parabolic automorphic type of hyperbolic type are shown to be circular.

Comments

Copyright © 2012 Rocky Mountain Mathematics Consortium

DOI: 10.1216/RMJ-2012-42-1-235

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