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ICALP
2004
Springer
16 years 4 days ago
Easily Refutable Subformulas of Large Random 3CNF Formulas
Abstract. A simple nonconstructive argument shows that most 3CNF formulas with cn clauses (where c is a large enough constant) are not satisfiable. It is an open question whether ...
Uriel Feige, Eran Ofek
RISE
2004
Springer
16 years 3 days ago
A Symbolic Model Checker for tccp Programs
In this paper, we develop a symbolic representation for timed concurrent constraint (tccp) programs, which can be used for defining a lightweight model–checking algorithm for re...
María Alpuente, Moreno Falaschi, Alicia Vil...
CP
2003
Springer
15 years 12 months ago
Propagating N-Ary Rigid-Body Constraints
In this paper, we present an algorithm to propagate an n-ary constraint (with n greater than 2) specifying the relative positions of points in a three-dimensional rigid group. The ...
Ludwig Krippahl, Pedro Barahona
CONCUR
2000
Springer
15 years 11 months ago
An Implicitly-Typed Deadlock-Free Process Calculus
Abstract. We extend Kobayashi and Sumii’s type system for the deadlock-free π-calculus and develop a type reconstruction algorithm. Kobayashi and Sumii’s type system helps hig...
Naoki Kobayashi, Shin Saito, Eijiro Sumii
FOCS
1998
IEEE
15 years 11 months ago
The Complexity of Acyclic Conjunctive Queries
This paper deals with the evaluation of acyclic Boolean conjunctive queries in relational databases. By well-known results of Yannakakis [1981], this problem is solvable in polynom...
Georg Gottlob, Nicola Leone, Francesco Scarcello