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DBPL
1995
Springer
106views Database» more  DBPL 1995»
15 years 10 months ago
On Impossibility of Decremental Recomputation of Recursive Queries in Relational Calculus and SQL
We study the problem of maintaining recursively-de ned views, such as the transitive closure of a relation, in traditional relational languages that do not have recursion mechanis...
Guozhu Dong, Leonid Libkin, Limsoon Wong
CP
2008
Springer
15 years 8 months ago
Model Restarts for Structural Symmetry Breaking
ctural abstractions that were introduced in [17]. Compared with other symmetry-breaking techniques, the big advantage of dynamic symmetry breaking is that it can accommodate dynami...
Daniel S. Heller, Aurojit Panda, Meinolf Sellmann,...
CATS
2008
15 years 8 months ago
Tractable Cases of the Extended Global Cardinality Constraint
We study the consistency problem for extended global cardinality (EGC) constraints. An EGC constraint consists of a set X of variables, a set D of values, a domain D(x) D for eac...
Marko Samer, Stefan Szeider
SODA
1998
ACM
99views Algorithms» more  SODA 1998»
15 years 8 months ago
On-Line File Caching
Consider the following file caching problem: in response to a sequence of requests for files, where each file has a specified size and retrieval cost, maintain a cache of files of ...
Neal E. Young
ATAL
2010
Springer
15 years 7 months ago
Pure Nash equilibria: complete characterization of hard and easy graphical games
We consider the computational complexity of pure Nash equilibria in graphical games. It is known that the problem is NP-complete in general, but tractable (i.e., in P) for special...
Albert Xin Jiang, MohammadAli Safari