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The Scientific World Journal - Volume 2014 2014, Article ID 242851, 9 pages -

Research Article

School of Mathematics and Statistics, Hubei University of Science and Technology, Xianning 437100, China

School of Mathematics and Computer Science, Xinyu University, Xinyu 338004, China

Beijing Key Laboratory of Information Service Engineering, Department of General Education, Beijing Union University, No. 97 Bei Si Huan Dong Road, Chaoyang District, Beijing 100101, China

Received 31 December 2013; Accepted 22 January 2014; Published 6 March 2014

Academic Editors: G. M. Amiraliyev and F. Kittaneh

Copyright © 2014 Zhaojun Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


By applying Ahlfors theory of covering surface, we establish a fundamental inequality of meromorphic function dealing with multiple values in an angular domain. As an application, we prove the existence of some new singular directions for a meromorphic function , namely a Bloch direction and a pseudo-T direction for .

Author: Zhaojun Wu, Yuxian Chen, and Zuxing Xuan



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