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» Clustering with the Connectivity Kernel
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ISAAC
2009
Springer
109views Algorithms» more  ISAAC 2009»
14 years 5 months ago
A Linear Vertex Kernel for Maximum Internal Spanning Tree
We present an algorithm that for any graph G and integer k ≥ 0 in time polynomial in the size of G either nds a spanning tree with at least k internal vertices, or outputs a ne...
Fedor V. Fomin, Serge Gaspers, Saket Saurabh, St&e...
ICPR
2008
IEEE
14 years 5 months ago
A novel validity measure for clusters of arbitrary shapes and densities
Several validity indices have been designed to evaluate solutions obtained by clustering algorithms. Traditional indices are generally designed to evaluate center-based clustering...
Noha A. Yousri, Mohamed S. Kamel, Mohamed A. Ismai...
IPPS
2003
IEEE
14 years 3 months ago
A Message Passing Interface Library for Inhomogeneous Coupled Clusters
Clusters of PC containing mostly general purpose hardware have become more and more usable for high performance computing tasks in the past few years. Clustering existing systems ...
Martin Pöppe, Silke Schuch, Thomas Bemmerl
INFOCOM
2006
IEEE
14 years 4 months ago
Collaboration Improves the Connectivity of Wireless Networks
— In the standard approach to studying connectivity, a physical layer is assumed that allows direct transmission between neighbors within some fixed distance. The graph resultin...
Sanquan Song, Dennis Goeckel, Donald F. Towsley
COMBINATORICS
2006
221views more  COMBINATORICS 2006»
13 years 10 months ago
Kernels of Directed Graph Laplacians
Abstract. Let G denote a directed graph with adjacency matrix Q and indegree matrix D. We consider the Kirchhoff matrix L = D - Q, sometimes referred to as the directed Laplacian. ...
John S. Caughman IV, J. J. P. Veerman