Unique Parallel Decomposition for the Pi-calculus
  A (fragment of a) process algebra satisfies unique parallel decomposition if the definable behaviours admit a unique decomposition into indecomposable parallel components. In this paper we prove that finite processes of the pi-calculus, i.e. processes that perform no infinite executions, satisfy this property modulo strong bisimilarity and weak bisimilarity. Our results are obtained by an application of a general technique for establishing unique parallel decomposition using decomposition orders. 
Matias David Lee (Univ. Lyon, ENS de Lyon, CNRS, UCB Lyon 1, LIP,   France.), Bas Luttik (Eindhoven University of Technology...
cs.LO cs.PL