Augmenting k-core generation with preferential attachment

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June 2008, 3(2): 277-294. doi: 10.3934/nhm.2008.3.277

Augmenting $k$-core generation with preferential attachment

Michael Baur ^1, , Marco Gaertler ^1, , Robert Görke ^1, , Marcus Krug ^1, and Dorothea Wagner ^1,

1.	Faculty of Informatics, Universität Karlsruhe (TH), 78131 Karlsruhe, Germany, Germany, Germany, Germany, Germany

Received August 2007 Revised March 2008 Published March 2008

Abstract
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The modeling of realistic networks is of prime importance for modern complex systems research. Previous procedures typically model the natural growth of networks by means of iteratively adding nodes, geometric positioning information, a definition of link connectivity based on the preference for nearest neighbors or already highly connected nodes, or combine several of these approaches.
Our novel model brings together the well-know concepts of $k$-cores, originally introduced in social network analysis, and of preferential attachment. Recent studies exposed the significant $k$-core structure of several real world systems, e.g., the AS network of the Internet. We present a simple and efficient method for generating networks which at the same time strictly adhere to the characteristics of a given $k$-core structure, called core fingerprint, and feature a power-law degree distribution. We showcase our algorithm in a com- parative evaluation with two well-known AS network generators.

Keywords: k-core structure, graph generation, preferential attachment.

Mathematics Subject Classification: Primary: 05C85, 05C80; Secondary: 05C7.

Citation: Michael Baur, Marco Gaertler, Robert Görke, Marcus Krug, Dorothea Wagner. Augmenting $k$-core generation with preferential attachment. Networks & Heterogeneous Media, 2008, 3 (2) : 277-294. doi: 10.3934/nhm.2008.3.277

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