Volume Integral Mean of Holomorphic Function on Polydisc
International Journal of Theoretical and Applied Mathematics
Volume 6, Issue 1, February 2020, Pages: 14-18
Received: Dec. 17, 2019;
Accepted: Jan. 4, 2020;
Published: Jan. 13, 2020
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Lijuan Xu, College of Science, Tianjin University of Technology and Education, Tianjin, China
Hua Liu, College of Science, Tianjin University of Technology and Education, Tianjin, China
Juan Chen, Basic Courses Department, Tianjin Sino-German University of applied Science, Tianjin, China
Xiaoli Bian, College of Science, Tianjin University of Technology and Education, Tianjin, China
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Let f be an analytic function in the Hardy space on the polydisc P2. In this article we discuss the area integral means Mp (f, r) of f on the polydisc P2 with radius r, and its weighted volume means Mp,α (f, r) with to the weight (1-|z1|2)a×(1-|z2|2)a. We prove that both Mp (f, r) and Mp,α (f, r) are strictly increasing in r unless f is a constant. In contrast to the classical case, we also give a example to show that log Mp,α (f, r) is not always convex with respect to log r, although that we still prove that log Mp (f, r) is logarithmically convex.
Hardy Space, Polydisc, Integral Means, Logarithmically Convex
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Volume Integral Mean of Holomorphic Function on Polydisc, International Journal of Theoretical and Applied Mathematics.
Vol. 6, No. 1,
2020, pp. 14-18.
Copyright © 2020 Authors retain the copyright of this article.
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