On the Scottish Book Problem 155 by Mazur and Sternbach

Problem 155 of the Scottish Book asks whether every bijection $U\colon X\rightarrow Y$ between two Banach spaces $X, Y$ with the property that, each point of $X$ has a neighborhood on which $U$ is isometric, is globally isometric on $X$. We prove that this is true under the additional assumption tha...

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Main Author: Mori, Michiya
Format: Article
Language:English
Published: Académie des sciences 2024-10-01
Series:Comptes Rendus. Mathématique
Online Access:https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.572/
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author Mori, Michiya
author_facet Mori, Michiya
author_sort Mori, Michiya
collection DOAJ
description Problem 155 of the Scottish Book asks whether every bijection $U\colon X\rightarrow Y$ between two Banach spaces $X, Y$ with the property that, each point of $X$ has a neighborhood on which $U$ is isometric, is globally isometric on $X$. We prove that this is true under the additional assumption that $X$ is separable and the weaker assumption of surjectivity instead of bijectivity.
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institution Kabale University
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spelling doaj-art-aed774f4f3df45d29eb95cd96bff25152025-02-07T11:22:49ZengAcadémie des sciencesComptes Rendus. Mathématique1778-35692024-10-01362G881381610.5802/crmath.57210.5802/crmath.572On the Scottish Book Problem 155 by Mazur and SternbachMori, Michiya0Graduate School of Mathematical Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8914, Japan; Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS), RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, JapanProblem 155 of the Scottish Book asks whether every bijection $U\colon X\rightarrow Y$ between two Banach spaces $X, Y$ with the property that, each point of $X$ has a neighborhood on which $U$ is isometric, is globally isometric on $X$. We prove that this is true under the additional assumption that $X$ is separable and the weaker assumption of surjectivity instead of bijectivity.https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.572/
spellingShingle Mori, Michiya
On the Scottish Book Problem 155 by Mazur and Sternbach
Comptes Rendus. Mathématique
title On the Scottish Book Problem 155 by Mazur and Sternbach
title_full On the Scottish Book Problem 155 by Mazur and Sternbach
title_fullStr On the Scottish Book Problem 155 by Mazur and Sternbach
title_full_unstemmed On the Scottish Book Problem 155 by Mazur and Sternbach
title_short On the Scottish Book Problem 155 by Mazur and Sternbach
title_sort on the scottish book problem 155 by mazur and sternbach
url https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.572/
work_keys_str_mv AT morimichiya onthescottishbookproblem155bymazurandsternbach