that provides an "unsatisfiable core" of an unsatisfiable set of clauses, often much smaller than the clause set as a whole. The unsatisfiable core is mapped back into the syntax of the original model, showing the user fragments of the model found to be irrelevant. This information can be a great help

As the use of SAT solvers as core engines in EDA applications grows, it becomes increasingly important to validate their correctness. In this paper, we describe the implementation of an independent resolution-based checking procedure that can check the validity of unsatisfiable claims produced

examine and regulate insurers. Often contracts also are covered by guaranty funds, which essentially allow the customers of failing insurance companies to transfer a portion of their unsatisfied claims to the other participating insurers. But, this safety network can fail if too many insurance companies

-cutable program independent of any supporting theorem prover, and (iii) that the checker certifies any SAT solver respecting the agreed format for satisfiability and unsatisfiability claims. The core of the system is a certified checker for un-satisfiability claims that is formally designed and verified in Coq

, and describes the results. These results will enable us to make probabilistic claims concerning the satisfiability (or unsatisfiability) of problems from the problem class investigated, using the Bayesian analysis. We present an example of this analysis. Finally, we conclude with a summary and some remarks. 2

by the causative verb. Moreover, the proposed constituent structure interacts with both Case Theory and head movemeut, yielding a principled explanation of aoss-linguistic variation of Causative Constructions with respect to Case and word order. Finally, it is claimed that a last resort d e, formulated as &apos

Louisville’s consolidation with Jefferson County was the first large-scale merger to take place in the United States in more than 30 years. The authors examine this merger as a major institutional innovation that was supposed to enhance economic development. Proponents of consolidation claimed

much computation and communication overhead to the clients. The service fulfillment rate may also be unsatisfied especially when there are not enough peers nearby. This paper proposes a new hybrid framework called HiSC that balances the load between the AS and mobile clients. HiSC partitions the space

to be unsatisfying to many OT proponents, who have found these proposals to be inconsistent with the parallelist approach to phonological processes otherwise characteristic of OT. In this paper I reexamine one of the best known cases of opacity, that found in three processes of Tiberian Hebrew (TH), and argue

. It is widely believed that a family \Sigma n of unsatisfiable formulae defined by Cook and Reckhow [Proc. of the ACM Symp. on Theory of Comp. 1974] gives a lower bound of O(2 2 n ) on the proof size with analytic tableaux. This claim plays a key role in the proof that tableaux cannot