Computability of probability measures and Martin-Löf randomness over metric spaces

  • Authors:
  • Mathieu Hoyrup;Cristóbal Rojas

  • Affiliations:
  • DI, Ecole Normale Supérieure, Paris, France;DI, Ecole Normale Supérieure and CREA, Ecole Polytechnique, Paris, France

  • Venue:
  • Information and Computation
  • Year:
  • 2009

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Abstract

In this paper, we investigate algorithmic randomness on more general spaces than the Cantor space, namely computable metric spaces. To do this, we first develop a unified framework allowing computations with probability measures. We show that any computable metric space with a computable probability measure is isomorphic to the Cantor space in a computable and measure-theoretic sense. We show that any computable metric space admits a universal uniform randomness test (without further assumption).