Characterizing joint distributions of random sets by multivariate capacities

  • Authors:
  • Bernhard Schmelzer

  • Affiliations:
  • Universität Innsbruck, Institut für Grundlagen der Bauingenieurwissenschaften, A-6020 Innsbruck, Austria

  • Venue:
  • International Journal of Approximate Reasoning
  • Year:
  • 2012

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Abstract

By the Choquet theorem, distributions of random closed sets can be characterized by a certain class of set functions called capacity functionals. In this paper a generalization to the multivariate case is presented, that is, it is proved that the joint distribution of finitely many random sets can be characterized by a multivariate set function being completely alternating in each component, or alternatively, by a capacity functional defined on complements of cylindrical sets. For the special case of finite spaces a multivariate version of the Moebius inversion formula is derived. Furthermore, we use this result to formulate an existence theorem for set-valued stochastic processes.