Causality in membrane systems

  • Authors:
  • Nadia Busi

  • Affiliations:
  • -

  • Venue:
  • WMC'07 Proceedings of the 8th international conference on Membrane computing
  • Year:
  • 2007

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Abstract

P systems are a biologically inspired model introduced by Gheorghe Paun with the aim of representing the structure and the functioning of the cell. P systems are usually equipped with the maximal parallelism semantics; however, since their introduction, some alternative semantics have been proposed and investigated. We propose a semantics that describes the causal dependencies occurring between the reactions of a P system. We investigate the basic properties that are satisfied by such a semantics. The notion of causality turns out to be quite relevant for biological systems, as it permits to point out which events occurring in a biological pathway are necessary for another event to happen.