Approximating labelled Markov processes again!

  • Authors:
  • Philippe Chaput;Vincent Danos;Prakash Panangaden;Gordon Plotkin

  • Affiliations:
  • School of Computer Science, McGill University;School of Informatics, University of Edinburgh;School of Computer Science, McGill University;School of Informatics, University of Edinburgh

  • Venue:
  • CALCO'09 Proceedings of the 3rd international conference on Algebra and coalgebra in computer science
  • Year:
  • 2009

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Abstract

Labelled Markov processes are continuous-state fully probabilistic labelled transition systems. They can be seen as co-algebras of a suitable monad on the category of measurable space. The theory as developed so far included a treatment of bisimulation, logical characterization of bisimulation, weak bisimulation, metrics, universal domains for LMPs and approximations. Much of the theory involved delicate properties of analytic spaces. Recently a new kind of averaging procedure was used to construct approximations. Remarkably, this version of the theory uses a dual view of LMPs and greatly simplifies the theory eliminating the need to consider aanlytic spaces. In this talk I will survey some of the ideas that led to this work.