International Journal of Mathematics and Mathematical Sciences
Volume 2011 (2011), Article ID 287145, 12 pages
Research Article

Comparison between Certain Equivalent Norms Regarding Some Familiar Properties Implying WFPP

Centro de Investigación en Matemáticas (CIMAT), Apartado Postal 402, 36000 Guanajuato, GTO, Mexico

Received 13 December 2010; Accepted 1 March 2011

Academic Editor: Enrique Llorens-Fuster

Copyright © 2011 Helga Fetter and Berta Gamboa de Buen. 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.


In a Banach space with a basis we define a similar norm to the norm shown by Lin to make 𝑙 1 into a space with FPP and make a comparative study of certain geometric properties such as the Opial property, WNS, and uniform nonsquareness of the original space and the space with the new norm.