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IPL
2002
117views more  IPL 2002»
13 years 11 months ago
Complexity of weak acceptance conditions in tree automata
Weak acceptance conditions for automata on infinite words or trees are defined in terms of the set of states that appear in the run. This is in contrast with, more usual, strong c...
Jakub Neumann, Andrzej Szepietowski, Igor Walukiew...
IPL
2002
118views more  IPL 2002»
13 years 11 months ago
Differential approximation results for the traveling salesman and related problems
This paper deals with the problem of constructing a Hamiltonian cycle of optimal weight, called TSP. We show that TSP is 2/3-differential approximable and can not be differential a...
Jérôme Monnot
IPL
2002
88views more  IPL 2002»
13 years 11 months ago
A note on practical construction of maximum bandwidth paths
Constructing maximum bandwidth paths has been a basic operation in the study of network routing, in particular in the recent study of network QoS routing. In the literature, it ha...
Navneet Malpani, Jianer Chen
IPL
2002
89views more  IPL 2002»
13 years 11 months ago
New bounds on the barycenter heuristic for bipartite graph drawing
The barycenter heuristic is often used to solve the NP-hard two-layer edge crossing minimization problem. It is well-known that the barycenter heuristic can give solutions as bad a...
Xiao Yu Li, Matthias F. M. Stallmann
IPL
2002
86views more  IPL 2002»
13 years 11 months ago
A polynomial algorithm for lot-size scheduling of two type tasks
We study the problem of scheduling unit time tasks of two types on m parallel identical machines. For each type, given numbers of tasks are required to be completed by the specifi...
Mikhail Y. Kovalyov, Marcus Pattloch, Günter ...
IPL
2002
60views more  IPL 2002»
13 years 11 months ago
An optimal algorithm for reporting visible rectangles
Nectarios Kitsios, Christos Makris, Spyros Sioutas...
IPL
2002
108views more  IPL 2002»
13 years 11 months ago
A heuristic to accelerate in-situ permutation algorithms
In-situ permutation algorithms are algorithms to permute an array of
Jörg Keller
IPL
2002
95views more  IPL 2002»
13 years 11 months ago
On a game in directed graphs
Inspired by recent algorithms for electing a leader in a distributed system, we study the following game in a directed graph: each vertex selects one of its outgoing arcs (if any)...
Alan J. Hoffman, Kate Jenkins, Tim Roughgarden
IPL
2002
118views more  IPL 2002»
13 years 11 months ago
Lower bounds for approximate polygon decomposition and minimum gap
We consider the problem of decomposing polygons (with holes) into various types of simpler polygons. We focus on the problem of partitioning a rectilinear polygon, with holes, int...
Joachim Gudmundsson, Thore Husfeldt, Christos Levc...