On the Recognizability of Arrow and Graph Languages

  • Authors:
  • H. J. Bruggink;Barbara König

  • Affiliations:
  • Universität Duisburg-Essen,;Universität Duisburg-Essen,

  • Venue:
  • ICGT '08 Proceedings of the 4th international conference on Graph Transformations
  • Year:
  • 2008

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Abstract

In this paper we give a category-based characterization of recognizability. A recognizable subset of arrows is defined via a functor into the category of relations on sets, which can be seen as a straightforward generalization of a finite automaton. In the second part of the paper we apply the theory to graphs, and we show that our approach is a generalization of Courcelle's recognizable graph languages.