Title:
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Lipschitz-quotients and the Kunen-Martin Theorem (English) |
Author:
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Dutrieux, Yves |
Language:
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English |
Journal:
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Commentationes Mathematicae Universitatis Carolinae |
ISSN:
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0010-2628 (print) |
ISSN:
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1213-7243 (online) |
Volume:
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42 |
Issue:
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4 |
Year:
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2001 |
Pages:
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641-648 |
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Category:
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math |
. |
Summary:
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We show that there is a universal control on the Szlenk index of a Lipschitz-quotient of a Banach space with countable Szlenk index. It is in particular the case when two Banach spaces are Lipschitz-homeomorphic. This provides information on the Cantor index of scattered compact sets $K$ and $L$ such that $C(L)$ is a Lipschitz-quotient of $C(K)$ (that is the case in particular when these two spaces are Lipschitz-homeomorphic). The proof requires tools of descriptive set theory. (English) |
Keyword:
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Lipschitz equivalences |
Keyword:
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Szenk index |
MSC:
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03E15 |
MSC:
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46B20 |
idZBL:
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Zbl 1069.03035 |
idMR:
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MR1883373 |
. |
Date available:
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2009-01-08T19:17:14Z |
Last updated:
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2012-04-30 |
Stable URL:
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http://hdl.handle.net/10338.dmlcz/119280 |
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Reference:
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[1] Godefroy N.J., Kalton G., Lancien G.: Szlenk indices and uniform homeomorphisms.Trans. Amer. Math. Soc. (2000), to appear. Zbl 0981.46007, MR 1837213 |
Reference:
|
[2] Bates W., Johnson J., Lindenstrauss D., Preiss G., Schechtman S.: Affine approximation of Lipschitz functions and nonlinear quotients.Geom. Funct. Anal. (1999), 6 1092-1127. Zbl 0954.46014, MR 1736929 |
Reference:
|
[3] Bossard B.: Théorie descriptive des ensembles en géométrie des espaces de Banach.Thèse de doctorat de l'Université Paris VI, (in French), 1994. |
Reference:
|
[4] Lancien G.: On the Szlenk index and the weak*-dentability index.Quart. J. Math. Oxford (2) (1996), 47 59-71. Zbl 0973.46014, MR 1380950 |
Reference:
|
[5] Kechris A., Louveau A.: Descriptive set theory and the structure of sets of uniqueness.London Math. Soc. Lecture Note Series (1987), 128. Zbl 0642.42014 |
Reference:
|
[6] Heinrich P., Mankiewicz S.: Applications of ultrapowers to the uniform and Lipschitz classification of Banach spaces.Studia Math. (1982), 73 225-251. Zbl 0506.46008, MR 0675426 |
Reference:
|
[7] Bourgain J.: New classes of $\Cal L^p$-spaces.Lecture Notes in Mathematics 889, Springer Verlag, 1981. MR 0639014 |
Reference:
|
[8] Christensen J.: Topology and Borel structure; descriptive topology and set theory with applications to functional analysis and measure theory.North-Holland Math. Stud. (1974), 10. Zbl 0273.28001, MR 0348724 |
Reference:
|
[9] Bossard B.: Codages des espaces de Banach séparables; familles analytiques et coanalytiques d'espaces de Banach.C.R. Acad. Sci. Paris, Série I, 316 (1993), 1005-1010. MR 1222962 |
Reference:
|
[10] Benyamini J., Lindenstrauss Y.: Geometric nonlinear functional analysis vol. I.AMS Colloquium Publications (2000), 48. |
Reference:
|
[11] Godefroy N., Kalton G., Lancien G.: Subspaces of $c_0(\Bbb N)$ and Lipschitz isomorphisms.Geom. Funct. Anal. (2000), to appear. |
Reference:
|
[12] Ribe M: Existence of separable uniformly homeomorphic non isomorphic Banach spaces.Israel J. Math. (1984), 48 139-147. MR 0770696 |
Reference:
|
[13] Bessaga A., Pełczyński C.: Spaces of continuous functions (IV).Studia Math. (1960), 19 53-62. Zbl 0094.30303, MR 0113132 |
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