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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(e) ISSN 0002-9939(p)

     

A weak Asplund space whose dual is not weak$^*$ fragmentable

Author(s): Petar S. Kenderov; Warren B. Moors; Scott Sciffer
Journal: Proc. Amer. Math. Soc. 129 (2001), 3741-3747.
MSC (2000): Primary 54C60, 46B20, 54C10
Posted: May 21, 2001
MathSciNet review: 1860511
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Abstract | References | Similar articles | Additional information

Abstract:

Under the assumption that there exists in the unit interval $[0,1]$ an uncountable set $A$ with the property that every continuous mapping from a Baire metric space $B$into $A$ is constant on some non-empty open subset of $B$, we construct a Banach space $X$ such that $(X^*,\mbox{weak$^*$ })$ belongs to Stegall's class but $(X^*,\mbox{weak$^*$ })$is not fragmentable.


References:

1.
G. Bachman and L. Narici, Functional Analysis, Academic Press, 1966. MR 36:638

2.
M. Fabian, Gâteaux Differentiability of Convex Functions: Weak Asplund Spaces, John Wiley and Sons, 1997. MR 98h:46009

3.
R. Frankiewicz and K. Kunen, Solution of Kuratowski's problem on functions having the Baire property I, Fund. Math. 128 (1987), 171-180. MR 89a:03090

4.
O. Kalenda, Stegall compact spaces which are not fragmentable, Topology Appl. 96 (1999), 121-132. MR 2000i:54027

5.
P. S. Kenderov and J. Orihuela, A generic factorization theorem, Mathematika 42 (1995), 56-66. MR 96h:54014

6.
W. B. Moors and S. D. Sciffer, Sigma-fragmentable spaces that are not countable unions of fragmentable subspaces, Topology Appl. (to appear.)

7.
I. Namioka and R. Pol, Mappings of Baire spaces into function spaces and Kadec renorming, Israel J. Math. 78 (1992), 1-20. MR 94f:46020

8.
C. Stegall, A class of topological spaces and differentiation of functions on Banach spaces, Vorlesungen aus dem Fachbereich Mathematik der Universität Essen 10 (1983), 63-77. MR 85j:46026


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Additional Information:

Petar S. Kenderov
Affiliation: Institute of Mathematics, Bulgarian Academy of Science, Acad. G. Bonchev Street, Block 8, 1113 Sofia, Bulgaria
Email: pkend@bgcict.acad.bg; pkend@math.bas.bg

Warren B. Moors
Affiliation: Department of Mathematics, University of Waikato, Private Bag 3105, Hamilton, New Zealand
Email: moors@math.auckland.ac.nz

Scott Sciffer
Affiliation: Department of Mathematics, University of Newcastle, Newcastle NSW-2308, Australia

DOI: 10.1090/S0002-9939-01-06002-6
PII: S 0002-9939(01)06002-6
Keywords: Stegall's class, fragmentability, weak Asplund space, double arrow space, Baire space, minimal usco.
Received by editor(s): February 17, 2000
Received by editor(s) in revised form: April 22, 2000
Posted: May 21, 2001
Additional Notes: The first author was partially supported by Grant MM-701/97 of the National Fund for Scientific Research of the Bulgarian Ministry of Education, Science and Technology
The second author was supported by a Marsden fund grant, VUW 703, administered by the Royal Society of New Zealand
Communicated by: Jonathan M. Borwein
Copyright of article: Copyright 2001, American Mathematical Society




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