Hostname: page-component-848d4c4894-pftt2 Total loading time: 0 Render date: 2024-05-13T18:07:47.688Z Has data issue: false hasContentIssue false

Asplund spaces and a variant of weak uniform rotundity

Published online by Cambridge University Press:  17 April 2009

John Giles
Affiliation:
Department of Mathematics, The University of Newcastle, Newcastle NSW 2308, Australia
Jon Vanderwerff
Affiliation:
Department of Mathematics, Le Sierra University, Riverside CA 92515, United States of America
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We introduce a property formally weaker than weak uniform rotundity, which we call equatorial weak uniform rotundity. We show that an equatorially weakly uniformly rotund norm need not be weakly locally uniformly rotund. Nevertheless, we show that an equatorially weakly uniformly rotund Banach space is an Asplund space.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 2000

References

REFERENCES

[1]Borwein, J.M., Giles, J.R. and Vanderwerff, J., ‘Rotund norms, Clarke subdifferentials and extensions of Lipschitz functions’, (CECM Preprint 98:126).Google Scholar
[2]Borwein, J.M., Moors, W.B. and Wang, X., ‘Generalized subdifferentials: a Baire categorical approach’, (CECM Preprint 99:127).Google Scholar
[3]Clarke, F.H., Optimization and nonsmooth analysis, Classics in Applied Mathematics 5 (SIAM, Philadelphia, PA, 1990).CrossRefGoogle Scholar
[4]Deville, R., Godefroy, G. and Zizler, V., Smoothness and renormings in Banach spaces, Pitman Monographs and Surveys in Pure and Applied Mathematics 64 (Longman, Harlow, U.K., 1993).Google Scholar
[5]Diestel, J., Geometry of Banach spaces—selected topics, Lecture Notes in Mathematics 485 (Springer-Verlag, Berlin, Heidelberg, New York, 1975).CrossRefGoogle Scholar
[6]Hájek, P., ‘Dual renormings of Banach spaces, Comment. Math. Univ. Carolin. 37 (1996), 241253.Google Scholar
[7]Smith, M.A., ‘Banach spaces that are uniformly rotund in weakly compact sets of directions, Canad. J. Math. 29 (1977), 963970.CrossRefGoogle Scholar