Geodesic
An improvement of Hayman's inequality on an angular domain
Cai-Feng Yi1 ; Yu Wang1 ; Hong-Yan Xu2
1Institute of Mathematics and Informatics Jiangxi Normal University 330022 Nanchang, Jiangxi, P.R. China
2Department of Informatics and Engineering Jingdezhen Ceramic Institute 333403 Jingdezhen, Jiangxi, P.R. China
Annales Polonici Mathematici, Tome 99 (2010) no. 2, pp. 181-192
Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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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.
DOI : 10.4064/ap99-2-5
Keywords: investigate properties meromorphic functions angular domain obtain form yangs inequality angular domain reducing coefficients haymans inequality moreover study haymans inequality different forms obtain accurate estimates sums deficiencies

Cai-Feng Yi  1   ; Yu Wang  1   ; Hong-Yan Xu  2

1 Institute of Mathematics and Informatics Jiangxi Normal University 330022 Nanchang, Jiangxi, P.R. China
2 Department of Informatics and Engineering Jingdezhen Ceramic Institute 333403 Jingdezhen, Jiangxi, P.R. China 
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Cai-Feng Yi; Yu Wang; Hong-Yan Xu. An improvement of Hayman's inequality
 on an angular domain. Annales Polonici Mathematici, Tome 99 (2010) no. 2, pp. 181-192. doi: 10.4064/ap99-2-5

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