Journal of Inequalities and Applications
Volume 2009 (2009), Article ID 503782, 7 pages
doi:10.1155/2009/503782
Research Article

A Double Inequality for Gamma Function

Xiaoming Zhang1 and Yuming Chu2

1Haining Radio and TV University, Haining 314400, Zhejiang, China
2Department of Mathematics, Huzhou Teachers College, Huzhou 313000, Zhejiang, China

Received 12 June 2009; Revised 21 August 2009; Accepted 30 August 2009

Academic Editor: Ramm Mohapatra

Copyright © 2009 Xiaoming Zhang and Yuming Chu. 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.

Abstract

Using the Alzer integral inequality and the elementary properties of the gamma function, a double inequality for gamma function is established, which is an improvement of Merkle's inequality.