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LICS
2006
IEEE
14 years 3 months ago
Obsessional Cliques: A Semantic Characterization of Bounded Time Complexity
We give a semantic characterization of bounded complexity proofs. We introduce the notion of obsessional clique in the relational model of linear logic and show that restricting t...
Olivier Laurent, Lorenzo Tortora de Falco
JELIA
2004
Springer
14 years 3 months ago
The CIFF Proof Procedure for Abductive Logic Programming with Constraints
Abstract. We introduce a new proof procedure for abductive logic programming and present two soundness results. Our procedure extends that of Fung and Kowalski by integrating abduc...
Ulrich Endriss, Paolo Mancarella, Fariba Sadri, Gi...
DM
2010
66views more  DM 2010»
13 years 10 months ago
Two proofs of the Bermond-Thomassen conjecture for tournaments with bounded minimum in-degree
The Bermond-Thomassen conjecture states that, for any positive integer r, a digraph of minimum out-degree at least 2r -1 contains at least r vertex-disjoint directed cycles. Thoma...
Stéphane Bessy, Nicolas Lichiardopol, Jean-...
DAM
2007
83views more  DAM 2007»
13 years 9 months ago
The proof theoretic strength of the Steinitz exchange theorem
We show that the logical theory QLA proves the Cayley–Hamilton theorem from the Steinitz exchange theorem together with a strengthening of the linear independence principle. Sin...
Michael Soltys
CG
2002
Springer
13 years 9 months ago
PDS-PN: A New Proof-Number Search Algorithm
Abstract. The paper introduces a new proof-number (PN) search algorithm, called PDS-PN. It is a two-level search, which performs at the first level a depth-first Proof-number and D...
Mark H. M. Winands, Jos W. H. M. Uiterwijk, H. Jaa...