An Enzyme-Inspired Approach to Surmount Barriers in Graph Bisection

  • Authors:
  • Yong-Hyuk Kim

  • Affiliations:
  • Department of Computer Science and Engineering, Kwangwoon University, Seoul, Korea 139-701

  • Venue:
  • ICCSA '08 Proceeding sof the international conference on Computational Science and Its Applications, Part I
  • Year:
  • 2008

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Abstract

Finding optimal solutions in the graph bisection problem is a notoriously hard task. One of the main reasons is the barriers which prevent search algorithms from reaching the optimal solutions. Given an algorithm for finding optimal solutions, the search process can be represented by a Markov chain. Every two neighboring solutions has a connection in the chain with a transition probability. If the algorithm is deterministic, many of the connections are set to the probability zero since they can never be chosen in the algorithm. It thus may happen that there is no path with a positive probability. We suggest a method to open paths with zero or near-zero transition probability by implicitly changing the chain, which we believe will eventually make the search more flexible. Experimental results showed significant improvement over traditional representative partitioning methodologies, the Fiduccia-Mattheyses algorithm and its two-phase variant.