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SIAMDM
2010
136views more  SIAMDM 2010»
14 years 11 months ago
Obnoxious Centers in Graphs
We consider the problem of finding obnoxious centers in graphs. For arbitrary graphs with n vertices and m edges, we give a randomized algorithm with O(n log2 n + m log n) expecte...
Sergio Cabello, Günter Rote
SAC
2000
ACM
15 years 9 months ago
A Weighted Coding in a Genetic Algorithm for the Degree-Constrained Minimum Spanning Tree Problem
The coding by which chromosomes represent candidate solutions is a fundamental design choice in a genetic algorithm. This paper describes a novel coding of spanning trees in a gen...
Günther R. Raidl, Bryant A. Julstrom
CONSTRAINTS
2010
110views more  CONSTRAINTS 2010»
15 years 2 months ago
Solving subgraph isomorphism problems with constraint programming
The subgraph isomorphism problem consists in deciding if there exists a copy of a pattern graph in a target graph. We introduce in this paper a global constraint and an associated ...
Stéphane Zampelli, Yves Deville, Christine ...
ICALP
2007
Springer
15 years 10 months ago
Parameterized Algorithms for Directed Maximum Leaf Problems
d Abstract) Noga Alon∗ Fedor V. Fomin† Gregory Gutin‡ Michael Krivelevich§ Saket Saurabh¶ We prove that finding a rooted subtree with at least k leaves in a directed grap...
Noga Alon, Fedor V. Fomin, Gregory Gutin, Michael ...
DIS
2007
Springer
15 years 8 months ago
Time and Space Efficient Discovery of Maximal Geometric Graphs
A geometric graph is a labeled graph whose vertices are points in the 2D plane with an isomorphism invariant under geometric transformations such as translation, rotation, and scal...
Hiroki Arimura, Takeaki Uno, Shinichi Shimozono