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Improving the efficiency of a hyperlinking-based theorem prover by incremental evaluation with network structures. (English) Zbl 0805.68103
Summary: Recently the first author and D. Plaisted [ibid. 9, No. 1, 25-42 (1992; Zbl 0784.68077)] proposed a theorem-proving method, the hyperlinking proof procedure, to eliminate duplication of instances of clauses during the process of inference. A theorem prover, CLIN, which implements the procedure was also constructed. In this implementation, redundant work on literal unification checking, partial unification checking, and duplicate instance checking is performed repetitively, resulting in a large overhead when many rounds of hyperlinking are needed for an input problem. We propose a technique that maintains information across rounds in shared network structures, so that the redundant work in each hyperlinking round can be avoided. Empirical performance comparison has been done between CLIN and CLIN-net, which is the theorem prover with shared network structures, and some results are shown. Problems related to memory overhead and literal ordering are discussed.
68T15 Theorem proving (deduction, resolution, etc.) (MSC2010)
03B35 Mechanization of proofs and logical operations
Full Text: DOI
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