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95
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LPNMR
2009
Springer
15 years 7 months ago
The Complexity of Circumscriptive Inference in Post's Lattice
Circumscription is one of the most important formalisms for reasoning with incomplete information. It is equivalent to reasoning under the extended closed world assumption, which a...
Michael Thomas
100
Voted
FOCS
2008
IEEE
15 years 7 months ago
On the Union of Cylinders in Three Dimensions
We show that the combinatorial complexity of the union of n infinite cylinders in R3 , having arbitrary radii, is O(n2+ε ), for any ε > 0; the bound is almost tight in the w...
Esther Ezra
74
Voted
TASE
2008
IEEE
15 years 7 months ago
ProB gets Nauty: Effective Symmetry Reduction for B and Z Models
Symmetry reduction holds great promise to counter the state explosion problem. However, currently it is “conducting a life on the fringe”, and is not widely applied, mainly du...
Corinna Spermann, Michael Leuschel
76
Voted
CONCUR
2007
Springer
15 years 7 months ago
Making Random Choices Invisible to the Scheduler
Abstract. When dealing with process calculi and automata which express both nondeterministic and probabilistic behavior, it is customary to introduce the notion of scheduler to res...
Konstantinos Chatzikokolakis, Catuscia Palamidessi
FORMATS
2007
Springer
15 years 7 months ago
Undecidability of Universality for Timed Automata with Minimal Resources
Timed automata were introduced by Alur and Dill in the early 1990s and have since become the most prominent modelling formalism for real-time systems. A fundamental limit to the al...
Sara Adams, Joël Ouaknine, James Worrell