Termination of Graph Rewriting is Undecidable

  • Authors:
  • Detlef Plump

  • Affiliations:
  • Fachbereich Mathematik und Informatik, Universität Bremen, 28334 Bremen, Germany. det@informatik.uni-bremen.de

  • Venue:
  • Fundamenta Informaticae
  • Year:
  • 1998

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Abstract

It is shown that it is undecidable in general whether a graph rewriting system (in the “double pushout approach”) is terminating. The proof is by a reduction of the Post Correspondence Problem. It is also argued that there is no straightforward reduction of the halting problem for Turing machines or of the termination problem for string rewriting systems to the present problem.