Minimal non-two-colorable hypergraphs and minimal unsatisfiable formulas
Journal of Combinatorial Theory Series A
Theory of linear and integer programming
Theory of linear and integer programming
The complexity of facets resolved
Journal of Computer and System Sciences - 26th IEEE Conference on Foundations of Computer Science, October 21-23, 1985
Polynomially solvable satisfiability problems
Information Processing Letters
A hierarchy of tractable satisfiability problems
Information Processing Letters
On generalized Horn formulas and k-resolution
Theoretical Computer Science
A Complexity Index for Satisfiability Problems
SIAM Journal on Computing
Recognition of q-Horn formulae in linear time
Discrete Applied Mathematics
New methods for 3-SAT decision and worst-case analysis
Theoretical Computer Science
On a generalization of extended resolution
Discrete Applied Mathematics - Special issue on the satisfiability problem and Boolean functions
A short note on some tractable cases of the satisfiability problem
Information and Computation
On subclasses of minimal unsatisfiable formulas
Discrete Applied Mathematics - Special issue on Boolean functions and related problems
Investigations on autark assignments
Discrete Applied Mathematics - Special issue on Boolean functions and related problems
Solving satisfiability problems using elliptic approximations - effective branching rules
Discrete Applied Mathematics - Special issue on Boolean functions and related problems
An efficient algorithm for the minimal unsatisfiability problem for a subclass of CNF
Annals of Mathematics and Artificial Intelligence
Parallel cooperative propositional theorem proving
Annals of Mathematics and Artificial Intelligence
The Complexity of Read-Once Resolution
Annals of Mathematics and Artificial Intelligence
Autarky Pruning in Propositional Model Elimination Reduces Failure Redundancy
Journal of Automated Reasoning
New Worst-Case Upper Bounds for SAT
Journal of Automated Reasoning
Polynomial-time recognition of minimal unsatisfiable formulas with fixed clause-variable difference
Theoretical Computer Science
A perspective on certain polynomial-time solvable classes of satisfiability
Discrete Applied Mathematics
An Upper Bound for Minimal Resolution Refutations
Proceedings of the 12th International Workshop on Computer Science Logic
NP-Completeness of Refutability by Literal-Once Resolution
IJCAR '01 Proceedings of the First International Joint Conference on Automated Reasoning
An Application of Matroid Theory to the SAT Problem
COCO '00 Proceedings of the 15th Annual IEEE Conference on Computational Complexity
Backbone fragility and the local search cost peak
Journal of Artificial Intelligence Research
Pushing the envelope: planning, propositional logic, and stochastic search
AAAI'96 Proceedings of the thirteenth national conference on Artificial intelligence - Volume 2
Polynomial-time recognition of minimal unsatisfiable formulas with fixed clause-variable difference
Theoretical Computer Science
Homomorphisms of conjunctive normal forms
Discrete Applied Mathematics - The renesse issue on satisfiability
Generalizations of Matched CNF Formulas
Annals of Mathematics and Artificial Intelligence
Minimal unsatisfiable formulas with bounded clause-variable difference are fixed-parameter tractable
Journal of Computer and System Sciences
Redundancy in logic I: CNF propositional formulae
Artificial Intelligence
Algorithms for maximum satisfiability using unsatisfiable cores
Proceedings of the conference on Design, automation and test in Europe
Computational complexity of quantified Boolean formulas with fixed maximal deficiency
Theoretical Computer Science
Present and Future of Practical SAT Solving
Complexity of Constraints
Redundancy in logic I: CNF propositional formulae
Artificial Intelligence
Minimal unsatisfiable formulas with bounded clause-variable difference are fixed-parameter tractable
COCOON'03 Proceedings of the 9th annual international conference on Computing and combinatorics
SAT'07 Proceedings of the 10th international conference on Theory and applications of satisfiability testing
On variables with few occurrences in conjunctive normal forms
SAT'11 Proceedings of the 14th international conference on Theory and application of satisfiability testing
On improving MUS extraction algorithms
SAT'11 Proceedings of the 14th international conference on Theory and application of satisfiability testing
A new bound for 3-satisfiable maxsat and its algorithmic application
FCT'11 Proceedings of the 18th international conference on Fundamentals of computation theory
Variable minimal unsatisfiability
TAMC'06 Proceedings of the Third international conference on Theory and Applications of Models of Computation
Observed lower bounds for random 3-SAT phase transition density using linear programming
SAT'05 Proceedings of the 8th international conference on Theory and Applications of Satisfiability Testing
Towards a taxonomy of techniques for designing parameterized algorithms
IWPEC'06 Proceedings of the Second international conference on Parameterized and Exact Computation
SAT'06 Proceedings of the 9th international conference on Theory and Applications of Satisfiability Testing
Minimal false quantified boolean formulas
SAT'06 Proceedings of the 9th international conference on Theory and Applications of Satisfiability Testing
Towards efficient MUS extraction
AI Communications - 18th RCRA International Workshop on “Experimental evaluation of algorithms for solving problems with combinatorial explosion”
On davis-putnam reductions for minimally unsatisfiable clause-sets
SAT'12 Proceedings of the 15th international conference on Theory and Applications of Satisfiability Testing
Fixed-parameter tractability of satisfying beyond the number of variables
SAT'12 Proceedings of the 15th international conference on Theory and Applications of Satisfiability Testing
Constraint Satisfaction Problems in Clausal Form I: Autarkies and Deficiency
Fundamenta Informaticae
A new bound for 3-satisfiable MaxSat and its algorithmic application
Information and Computation
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We study the problem of (efficiently) deleting such clauses from conjunctive normal forms (clause-sets) which cannot contribute to any proof of unsatisfiability. For that purpose we introduce the notion of an autarky system A, which detects deletion of superfluous clauses from a clause-set F and yields a canonical normal form NA(F) ⊆ F. Clause-sets where no clauses can be deleted are called A-lean, a natural weakening of minimally unsatisfiable clause-sets opening the possibility for combinatorial approaches and including also satisfiable instances. Three special examples for autarky systems are considered: general autarkies, linear autarkies (based on linear programming) and matching autarkies (based on matching theory). We give new characterizations of ("absolutely") lean clause-sets in terms of qualitative matrix analysis, while matching lean clause-sets are characterized in terms of deficiency (the difference between the number of clauses and the number of variables), by having a cyclic associated transversal matroid, and also in terms of fully indecomposable matrices. Finally we discuss how to obtain polynomial time satisfiability decision for clause-sets with bounded deficiency, and we make a few steps towards a general theory of autarky systems.