Abstract
This paper advocates and explores the use of multi-predicate induction schemes for proofs about mutually recursive functions. The interactive application of multi-predicate schemes stemming from datatype definitions is already well-established practice; this paper describes an automated proof procedure based on multi-predicate schemes. Multi-predicate schemes may be formally derived from (mutually recursive) function definitions; such schemes are often helpful in proving properties of mutually recursive functions where the recursion pattern does not follow that of the underlying datatypes. These ideas have been implemented using the HOL theorem prover and the Clam proof planner.
Research supported by the Engineering and Physical Sciences Research Council of Great Britain under grants GR/L03071 and GR/L14381. The authors thank Alan Bundy, Ian Green and Christoph Walther for their feedback on this work.
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Boulton, R.J., Slind, K. (2000). Automatic Derivation and Application of Induction Schemes for Mutually Recursive Functions. In: Lloyd, J., et al. Computational Logic — CL 2000. CL 2000. Lecture Notes in Computer Science(), vol 1861. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44957-4_42
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DOI: https://doi.org/10.1007/3-540-44957-4_42
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