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The Beckman–Quarles theorem via the triangle inequality

  • Vilmos Totik EMAIL logo
Published/Copyright: June 24, 2021
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Abstract

We give a short, elementary and non-computational proof for the classical Beckman–Quarles theorem asserting that a map of a Euclidean space into itself that preserves distance 1 must be an isometry.

MSC 2010: 51-01
  1. Communicated by: T. Grundhöfer

References

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Received: 2020-06-10
Published Online: 2021-06-24
Published in Print: 2021-10-26

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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