Kodai Mathematical Journal
Online ISSN : 1881-5472
Print ISSN : 0386-5991
ISSN-L : 0386-5991
On integral means of the derivatives of Blaschke products
Yasuhiro Gotoh
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2007 Volume 30 Issue 1 Pages 147-155

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Abstract
Kutbi and Protas showed that if the zeros {ak} of a given Blaschke product B satisfy Σk (1 - |ak|)α < ∞ for some α ∈ (0, 1), then the integral means of its derivative B(n) satisfies certain estimate. In this paper, we extend their result.
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© 2007 Department of Mathematics, Tokyo Institute of Technology
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