An improvement of Hayman's inequality
 on an angular domain

Cai-Feng Yi; Yu Wang; Hong-Yan Xu

doi:10.4064/ap99-2-5

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An improvement of Hayman's inequality on an angular domain

Volume 99 / 2010

Cai-Feng Yi, Yu Wang, Hong-Yan Xu Annales Polonici Mathematici 99 (2010), 181-192 MSC: Primary 30D35. DOI: 10.4064/ap99-2-5

Abstract

We investigate the properties of meromorphic functions on an angular domain, and obtain a form of Yang's inequality on an angular domain by reducing the coefficients of Hayman's inequality. Moreover, we also study Hayman's inequality in different forms, and obtain accurate estimates of sums of deficiencies.

Authors

Cai-Feng YiInstitute of Mathematics and Informatics
Jiangxi Normal University
330022 Nanchang, Jiangxi, P.R. China
e-mail
Yu WangInstitute of Mathematics and Informatics
Jiangxi Normal University
330022 Nanchang, Jiangxi, P.R. China
Hong-Yan XuDepartment of Informatics and Engineering
Jingdezhen Ceramic Institute
333403 Jingdezhen, Jiangxi, P.R. China
e-mail

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