Title of article
Normal structure and the generalized James and Zbăganu constants Original Research Article
Author/Authors
Ji Gao، نويسنده , , Satit Saejung، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2009
Pages
6
From page
3047
To page
3052
Abstract
We present several sufficient conditions for normal structure of a Banach space in terms of the generalized James, von Neumann–Jordan, Zbăganu constants, and the coefficient of weak orthogonality of Sims. Our results significantly improve many known results in the literatures. A negative answer is given to the question of Llorens–Fuster [E. Llorens-Fuster, Zbganu constant and normal structure, Fixed Point Theory 9 (2008) 159–172].
Keywords
normal structure , uniform normal structure , Coefficient of weak orthogonality , Generalized James and Zb?ganu constants
Journal title
Nonlinear Analysis Theory, Methods & Applications
Serial Year
2009
Journal title
Nonlinear Analysis Theory, Methods & Applications
Record number
861426
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