Counterexamples to applicative simulation and extensionality in non-deterministic call-by-need lambda-calculi with letrec

Manfred Schmidt-Schauß, David Sabel, Elena Machkasova. Counterexamples to applicative simulation and extensionality in non-deterministic call-by-need lambda-calculi with letrec. Inf. Process. Lett., 111(14):711-716, 2011. [doi]

Abstract

Abstract is missing.