Journal of Inequalities and Applications
Volume 2007 (2007), Article ID 71012, 6 pages
Research Article

Some Properties of Pythagorean Modulus

Fenghui Wang

Department of Mathematics, Luoyang Normal University, Luoyang 471022, China

Received 7 July 2007; Revised 22 November 2007; Accepted 3 December 2007

Academic Editor: András Rontó

Copyright © 2007 Fenghui Wang. 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.


We consider two Pythagorean modulus introduced by Gao (2005, 2006) recently. The exact values concerning these modulus for some classical Banach spaces are determined. Some applications in geometry of Banach spaces are also obtained.