Calcul du rang des ∑-arbres infinis regulers

  • G. Jacob
Contributed Papers
Part of the Lecture Notes in Computer Science book series (LNCS, volume 112)


Let ∑ be a finite craded set. The regular ∑-trees can be encoded into data sequences, using the scalar iterative expressions (as in EXEL-language [1]). The complexity of scalar iterative expressions can be defined in various way and so it is for regular ∑-trees. Here, we present a method for calculating the "rank" of such a tree, with and without concatenation.

In the flow chart case, our algorithm allows to decide if a chart G is (syntactically) reducible to some GREn-chart. Recall that the request of Kosaraju [9] for a "structural characterization" of the GREn-charts is till now an open question.


Nous Allons Nous Obtenons Nous Montrons Nous Donnons Obtient Ainsi 
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 1981

Authors and Affiliations

  • G. Jacob
    • 1
  1. 1.LITP et Université de Lille IVilleneuve D'Ascq Cedex

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