Orderings for innermost termination

Abstract

This paper shows that the suitable orderings for proving innermost termination are characterized by the innermost parallel monotonicity, IP-monotonicity for short. This property may lead to several innermost-specific orderings. Here, an IP-monotonic version of the Recursive Path Ordering is presented. This variant can be used (directly or as ingredient of the Dependency Pairs method) for proving innermost termination of non-terminating term rewrite systems. © Springer-Verlag Berlin Heidelberg 2005.