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Generalized Shortest Path Kernel on Graphs

  • Linus Hermansson
  • Fredrik D. Johansson
  • Osamu Watanabe
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9356)

Abstract

We consider the problem of classifying graphs using graph kernels. We define a new graph kernel, called the generalized shortest path kernel, based on the number and length of shortest paths between nodes. For our example classification problem, we consider the task of classifying random graphs from two well-known families, by the number of clusters they contain. We verify empirically that the generalized shortest path kernel outperforms the original shortest path kernel on a number of datasets. We give a theoretical analysis for explaining our experimental results. In particular, we estimate distributions of the expected feature vectors for the shortest path kernel and the generalized shortest path kernel, and we show some evidence explaining why our graph kernel outperforms the shortest path kernel for our graph classification problem.

Keywords

Graph kernel SVM Machine learning Shortest path 

Notes

Acknowledgements

This work is supported in part by the ELC project (MEXT KAKENHI No. 24106008) and also in part by the Swedish Foundation for Strategic Research.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Linus Hermansson
    • 1
  • Fredrik D. Johansson
    • 2
  • Osamu Watanabe
    • 1
  1. 1.Tokyo Institute of TechnologyTokyoJapan
  2. 2.Chalmers University of TechnologyGothenburgSweden

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