Around Ulam's question on retractions
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Lipschtz mappings, optimal retractions on sphereAbstrakt
It is known that the unit ball in infinitely dimensional Hilbert space can be retracted onto its boundary via a lipschitzian mapping. The magnitude of Lipschitz constant is only roughly estimated. The note contains a number of observations connected to this result and opens some new problems.Pobrania
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2012-04-23
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CHAOHA, Phichet, GOEBEL, Kazimierz & TERMWUTTIPONG, Imchit. Around Ulam’s question on retractions. Topological Methods in Nonlinear Analysis [online]. 23 kwiecień 2012, T. 40, nr 1, s. 215–224. [udostępniono 26.5.2024].
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