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WEBDB
2005
Springer
132views Database» more  WEBDB 2005»
15 years 10 months ago
On the role of composition in XQuery
Nonrecursive XQuery is known to be hard for nondeterministic exponential time. Thus it is commonly believed that any algorithm for evaluating XQuery has to require exponential amo...
Christoph Koch
140
Voted
WINE
2005
Springer
182views Economy» more  WINE 2005»
15 years 10 months ago
Inapproximability Results for Combinatorial Auctions with Submodular Utility Functions
We consider the following allocation problem arising in the setting of combinatorial auctions: a set of goods is to be allocated to a set of players so as to maximize the sum of t...
Subhash Khot, Richard J. Lipton, Evangelos Markaki...
PODC
2004
ACM
15 years 10 months ago
Compact routing on euclidian metrics
We consider the problem of designing a compact communication network that supports efficient routing in an Euclidean plane. Our network design and routing scheme achieves 1+ stret...
Ittai Abraham, Dahlia Malkhi
CONCUR
2004
Springer
15 years 10 months ago
Model Checking Timed Automata with One or Two Clocks
In this paper, we study model checking of timed automata (TAs), and more precisely we aim at finding efficient model checking for subclasses of TAs. For this, we consider model ch...
François Laroussinie, Nicolas Markey, Ph. S...
ESA
2004
Springer
120views Algorithms» more  ESA 2004»
15 years 10 months ago
Solving Geometric Covering Problems by Data Reduction
We consider a scenario where stops are to be placed along an already existing public transportation network in order to improve its attractiveness for the customers. The core probl...
Steffen Mecke, Dorothea Wagner