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SSD
2001
Springer
120views Database» more  SSD 2001»
13 years 12 months ago
On Multi-way Spatial Joins with Direction Predicates
Spatial joins are fundamental in spatial databases. Over the last decade, the primary focus of research has been on joins with the predicate “region intersection.” In modern da...
Hongjun Zhu, Jianwen Su, Oscar H. Ibarra
PODC
1999
ACM
13 years 11 months ago
Optimal, Distributed Decision-Making: The Case of no Communication
We present a combinatorial framework for the study of a natural class of distributed optimization problems that involve decisionmaking by a collection of n distributed agents in th...
Marios Mavronicolas, Paul G. Spirakis
FOCS
1998
IEEE
13 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
FC
1998
Springer
96views Cryptology» more  FC 1998»
13 years 11 months ago
Compliance Checking in the PolicyMaker Trust Management System
Emerging electronic commerce services that use public-key cryptography on a mass-market scale require sophisticated mechanisms for managing trust. For example, any service that rec...
Matt Blaze, Joan Feigenbaum, Martin Strauss
ATAL
2006
Springer
13 years 11 months ago
On the complexity of practical ATL model checking
We investigate the computational complexity of reasoning about multi-agent systems using the cooperation logic ATL of Alur, Henzinger, and Kupferman. It is known that satisfiabili...
Wiebe van der Hoek, Alessio Lomuscio, Michael Wool...