On Lipschitz mappings between Fréchet spaces
P. Mankiewicz (1972)
Studia Mathematica
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P. Mankiewicz (1972)
Studia Mathematica
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P. Mankiewicz (1973)
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Sven Heinrich (1986)
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S. Heinrich, P. Mankiewicz (1982)
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Dean Ives (2010)
Commentationes Mathematicae Universitatis Carolinae
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We show that the following well-known open problems on existence of Lipschitz isomorphisms between subsets of Hilbert spaces are equivalent: Are balls isomorphic to spheres? Is the whole space isomorphic to the half space?
Tomás Domínguez Benavides (1980)
Collectanea Mathematica
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