A threshold of ln n for approximating set cover (preliminary version)
STOC '96 Proceedings of the twenty-eighth annual ACM symposium on Theory of computing
Multiwavelength optical networks with limited wavelength conversion
IEEE/ACM Transactions on Networking (TON)
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IEEE Transactions on Computers
Approximation algorithms for combinatorial problems
Journal of Computer and System Sciences
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ESA '08 Proceedings of the 16th annual European symposium on Algorithms
Algorithms for connected set cover problem and fault-tolerant connected set cover problem
Theoretical Computer Science
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DEXA '09 Proceedings of the 20th International Conference on Database and Expert Systems Applications
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RECOMB'08 Proceedings of the 12th annual international conference on Research in computational molecular biology
Algorithms for detecting significantly mutated pathways in cancer
RECOMB'10 Proceedings of the 14th Annual international conference on Research in Computational Molecular Biology
Note: The relation of Connected Set Cover and Group Steiner Tree
Theoretical Computer Science
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We study an extension of the set cover problem, the connected set cover problem, the problem is to find a set cover of minimal size that satisfies some connectivity constraint. We first propose two algorithms that find optimal solutions for two cases, respectively, and then we propose one approximation algorithm for a special case that has the best possible performance ratio. At last we consider how to apply the obtained result to solve a wavelength assignment problem in all optical networks.