Foundations of Physics

, Volume 32, Issue 1, pp 77–108 | Cite as

Fundamental Units of Length and Time

  • A. N. Bernal
  • M. P. López
  • M. Sánchez


Ideal rods and clocks are defined as an infinitesimal symmetry of the spacetime, at least in the non-quantum case. Since no a priori geometric structure is considered, all the possible models of spacetime are obtained.


Geometric Structure Fundamental Unit Infinitesimal Symmetry 
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Copyright information

© Plenum Publishing Corporation 2002

Authors and Affiliations

  • A. N. Bernal
    • 1
  • M. P. López
    • 1
  • M. Sánchez
    • 1
  1. 1.Departamento de Geometría y TopologíaUniversidad de Granada, Facultad de Ciencias, Fuentenueva s/nGranadaSpain

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