Acta Informatica

, Volume 41, Issue 4–5, pp 257–272 | Cite as

Hybrid networks of evolutionary processors are computationally complete

  • Erzsébet Csuhaj-VarjúEmail author
  • Carlos Martín-Vide
  • Victor Mitrana


A hybrid network of evolutionary processors (an HNEP) consists of several language processors which are located in the nodes of a virtual graph and able to perform only one type of point mutations (insertion, deletion, substitution) on the words found in that node, according to some predefined rules. Each node is associated with an input and an output filter, defined by some random-context conditions. After applying in parallel a point mutation to all the words existing in every node, the new words which are able to pass the output filter of the respective node navigate simultaneously through the network and enter those nodes whose input filter they are able to pass. We show that even the so-called elementary HNEPs are computationally complete. In this case every node is able to perform only one instance of the specified operation: either an insertion, or a deletion, or a substitution of a certain symbol. We also prove that in the case of non-elementary networks, any recursively enumerable language over a common alphabet can be obtained with an HNEP whose underlying structure is a fixed graph depending on the common alphabet only.


Information System Operating System Data Structure Communication Network Information Theory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin/Heidelberg 2005

Authors and Affiliations

  • Erzsébet Csuhaj-Varjú
    • 1
    Email author
  • Carlos Martín-Vide
    • 2
  • Victor Mitrana
    • 2
  1. 1.Computer and Automation Research InstituteHungarian Academy of SciencesBudapestHungary
  2. 2.Research Group in Mathematical LinguisticsRovira i Virgili UniversityTarragonaSpain

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