DFKI Research Report-93-42

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RR-93-42



Language: English

by Hubert Comon, Ralf Treinen

The First-Order Theory of Lexicographic Path Orderings is Undecidable

9 Pages

Abstract

We show, under some assumption on the signature, that the *This formula not viewable on a Text-Browser* fragment of the theory of any lexicographic path ordering is undecidable. This applies to partial and to total precedences. Our result implies in particular that the simplification rule of ordered completion is undecidable.

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DFKI-Bibliothek (bib@dfki.uni-kl.de)

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