# A proof tool for reasoning about functional programs

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## Abstract

This paper describes a system to support reasoning about lazy functional programs. The system is based on a combination of a deep embedding of the language in HOL with a set of proof tools to raise the level of interaction with the theorem prover. This approach allows metatheoretic reasoning about the semantics and reasoning about undefined programs while still supporting practical reasoning about programs in the language.

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© Springer-Verlag Berlin Heidelberg 1996