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Open Access

Bounds for the Ratio of Two Gamma Functions

Journal of Inequalities and Applications20102010:493058

Received: 28 July 2009

Accepted: 16 January 2010

Published: 8 March 2010


By looking back at the long history of bounding the ratio for and , various origins of this topic are clarified, several developed courses are followed, different results are compared, useful methods are summarized, new advances are presented, some related problems are pointed out, and related references are collected.


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Authors’ Affiliations

Department of Mathematics, College of Science, Tianjin Polytechnic University, Tianjin City, China


© Feng Qi. 2010

This article is published under license to BioMed Central Ltd. 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.