A Reduction Ordering for Higher-Order Terms Juergen Avenhaus, Carlos Loria-Saenz, Joachim Steinbach Fachbereich Informatik, Universitaet Kaiserslautern D-67663 Kaiserslautern, GERMANY E-mail: avenhaus@informatik.uni-kl.de Abstract We investigate one of the classical problems of the theory of term rewriting, namely termination. We present an ordering for comparing higher-order terms that can be utilized for testing termination and decreasingness of higher-order conditional term rewriting systems. The ordering relies on a first-order interpretation of higher-order terms and a suitable extension of the RPO. Source anonymous FTP server ftp.uni-kl.de [131.246.94.94] path: /reports_uni-kl/computer_science/SEKI/1995/ file: Avenhaus.SR-95-03.ps.gz