Download PDF by Amy P. Felty, Aart Middeldorp: Automated Deduction - CADE-25: 25th International Conference

By Amy P. Felty, Aart Middeldorp

ISBN-10: 3319214004

ISBN-13: 9783319214009

ISBN-10: 3319214012

ISBN-13: 9783319214016

This publication constitutes the court cases of the twenty fifth overseas convention on computerized Deduction, CADE-25, held in Berlin, Germany, in August 2015.

The 36 revised complete papers awarded ( 24 complete papers and 12 process descriptions) have been rigorously reviewed and chosen from eighty five submissions. CADE is the main discussion board for the presentation of analysis in all features of automatic deduction, together with foundations, purposes, implementations and sensible experience.

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Extra resources for Automated Deduction - CADE-25: 25th International Conference on Automated Deduction, Berlin, Germany, August 1-7, 2015, Proceedings

Example text

By resolving each atom away in turn, the depth of a ground resolution refutation can also be bounded by H. Lifting this refutation to first-order may require binary factorings to merge literals that correspond to the same ground literal. For simplicity assume that the set of input clauses is closed under binary factorings. H − 1 factoring operations or less on each clause after each resolution except the last one suffice to merge non-ground literals that correspond to the same ground literal. With not more than H − 1 binary factoring operations after each resolution, the total refutation depth will be not more than H 2 .

The inference method Inf of AMB is complete if it is computable and the following holds: For any refutational set {(I1 , J1 , W1 ), . . , (In , Jn , Wn )} of conflict triples having more than one element, it is possible to apply the inference method Inf to two elements Ii and Ij in the set producing another conflict triple (I , J , W ) such that J ⊆ Ji and J ⊆ Jj , hence W contradicts both Ji and Jj . If the extension process stops, then AMB repeatedly applies the inference method Inf to the set of conflict triples in the extension sequence to replace conflict triples for Ii and Ij by a conflict triple for I , producing a smaller refutational set, and this operation is repeated until the set of conflict triples has only one element (I, J, W ).

Denote a binary factoring operation on C1 with result C as the pair (C1 , C). The complexity WFACT (C1 , C) of a binary factoring operation on C1 is sdag (C1 ). If R is a set of binary resolutions and binary factorings then define WRES (R) as the sum of WRES (C1 , C2 , C) for all resolutions (C1 , C2 , C) in R plus the sum of WFACT (C1 , C) for all binary factorings in R. Also, for a set S of clauses, let R(S) be the set of all binary resolutions (C1 , C2 , C) for clauses C1 , C2 in S together with all binary factoring operations (C1 , C) for clauses C1 in S.

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Automated Deduction - CADE-25: 25th International Conference on Automated Deduction, Berlin, Germany, August 1-7, 2015, Proceedings by Amy P. Felty, Aart Middeldorp


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