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» Complexity of the Cover Polynomial
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JCO
2010
182views more  JCO 2010»
13 years 8 months ago
Polynomial time approximation schemes for minimum disk cover problems
The following planar minimum disk cover problem is considered in this paper: given a set D of n disks and a set P of m points in the Euclidean plane, where each disk covers a subse...
Chen Liao, Shiyan Hu
IVC
2000
179views more  IVC 2000»
13 years 9 months ago
A system to place observers on a polyhedral terrain in polynomial time
The Art Gallery Problem deals with determining the number of observers necessary to cover an art gallery room such that every point is seen by at least one observer. This problem ...
Maurício Marengoni, Bruce A. Draper, Allen ...
WADS
2005
Springer
122views Algorithms» more  WADS 2005»
14 years 3 months ago
Parameterized Complexity of Generalized Vertex Cover Problems
Important generalizations of the Vertex Cover problem (Connected Vertex Cover, Capacitated Vertex Cover, and Maximum Partial Vertex Cover) have been intensively studied in terms of...
Jiong Guo, Rolf Niedermeier, Sebastian Wernicke
CSR
2008
Springer
13 years 11 months ago
Comparing Universal Covers in Polynomial Time
The universal cover TG of a connected graph G is the unique (possible infinite) tree covering G, i.e., that allows a locally bijective homomorphism from TG to G. Universal covers h...
Jirí Fiala, Daniël Paulusma
COCOA
2008
Springer
13 years 11 months ago
Polynomial Time Approximation Scheme for Connected Vertex Cover in Unit Disk Graph
Connected Vertex Cover Problem (CVC) is an NP-hard problem. The currently best known approximation algorithm for CVC has performance ration 2. This paper gives the first Polynomial...
Zhao Zhang, Xiaofeng Gao, Weili Wu