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Uniform Non-Equivalence between Euclidean and Hyperbolic Spaces

E. Gorelik, Joram Lindenstrauss, Mark Rudelson

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Abstract

It is well known that the Euclidean and hyperbolic (Lobachevsky-Bolyai) spaces E n , H n of the same dimension n are homeomorphic. V. A. Efremovich ([1], [2]) proved in 1945, that E n and H n are not uniformly homeomorphic; this means that there does not exist any homeomorphism between them that is uniform together with its inverse.

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What this paper is about

It is well known that the Euclidean and hyperbolic (Lobachevsky-Bolyai) spaces E n , H n of the same dimension n are homeomorphic. V. A. Efremovich ([1], [2]) proved in 1945, that E n and H n are not uniformly homeomorphic; this means that there does not exist any homeomorphism between them that is uniform together with its inverse.

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Available abstract

It is well known that the Euclidean and hyperbolic (Lobachevsky-Bolyai) spaces E n , H n of the same dimension n are homeomorphic. V. A. Efremovich ([1], [2]) proved in 1945, that E n and H n are not uniformly homeomorphic; this means that there does not exist any homeomorphism between them that is uniform together with its inverse.

Key concepts: Mathematics, Euclidean geometry, Homeomorphism (graph theory), Equivalence (formal languages), Pure mathematics, Hyperbolic geometry, Dimension (graph theory), Inverse

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