The compression structure of a process

  • Authors:
  • Thuy Duong Vu

  • Affiliations:
  • Programming Research Group, University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, The Netherlands

  • Venue:
  • Information Processing Letters
  • Year:
  • 2005

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Abstract

This paper is about orthogonal bisimulation, a notion introduced by Bergstra, Ponse and van der Zwaag in 2003. Orthogonal bisimulation is a refinement of branching bisimulation, in which consecutive tau's (silent steps) can be compressed into one (but not zero) tau's. The main advantage of orthogonal bisimulation, compared to branching bisimulation, is that it combines better with priorities. This paper presents the notion of a compression structure of a process. It is proved that two processes are orthogonally bisimilar if and only if they have the same compression structure. Thus compression structure characterizes orthogonal bisimulation in the same way as branching structure (van Glabbeek, 1993) characterizes branching bisimulation.