Crossover can simulate bounded tree search on a fixed-parameter tractable optimization problem

Andrew M. Sutton

doi:10.1145/3205455.3205598

Crossover can simulate bounded tree search on a fixed-parameter tractable optimization problem

Andrew M. Sutton

Computer Science (Duluth)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Scopus citations

Abstract

We investigate the effect of crossover in the context of parameterized complexity on a well-known fixed-parameter tractable combinatorial optimization problem known as the closest string problem. We prove that a multi-start (+1) GA solves arbitrary length-n instances of closest string in 2^O(^d ²⁺d log k⁾ · poly(n) steps in expectation. Here, k is the number of strings in the input set, and d is the value of the optimal solution. This confirms that the multi-start (+1) GA runs in randomized fixed-parameter tractable (FPT) time with respect to the above parameterization. On the other hand, if the crossover operation is disabled, we show there exist instances that require n^Ω(log(d+k⁾⁾ steps in expectation. The lower bound asserts that crossover is a necessary component in the FPT running time.

Original language	English (US)
Title of host publication	GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference
Publisher	Association for Computing Machinery, Inc
Pages	1531-1538
Number of pages	8
ISBN (Electronic)	9781450356183
DOIs	https://doi.org/10.1145/3205455.3205598
State	Published - Jul 2 2018
Event	2018 Genetic and Evolutionary Computation Conference, GECCO 2018 - Kyoto, Japan Duration: Jul 15 2018 → Jul 19 2018

Publication series

Name	GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference

Other

Other	2018 Genetic and Evolutionary Computation Conference, GECCO 2018
Country	Japan
City	Kyoto
Period	7/15/18 → 7/19/18

Keywords

Crossover
Evolutionary algorithms
Fixed-parameter tractability
Parameterized complexity
Recombination
Theory

Access

10.1145/3205455.3205598

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Cite this

Sutton, A. M. (2018). Crossover can simulate bounded tree search on a fixed-parameter tractable optimization problem. In GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference (pp. 1531-1538). (GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference). Association for Computing Machinery, Inc. https://doi.org/10.1145/3205455.3205598

Crossover can simulate bounded tree search on a fixed-parameter tractable optimization problem. / Sutton, Andrew M.

GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference. Association for Computing Machinery, Inc, 2018. p. 1531-1538 (GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Sutton, AM 2018, Crossover can simulate bounded tree search on a fixed-parameter tractable optimization problem. in GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference. GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference, Association for Computing Machinery, Inc, pp. 1531-1538, 2018 Genetic and Evolutionary Computation Conference, GECCO 2018, Kyoto, Japan, 7/15/18. https://doi.org/10.1145/3205455.3205598

Sutton AM. Crossover can simulate bounded tree search on a fixed-parameter tractable optimization problem. In GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference. Association for Computing Machinery, Inc. 2018. p. 1531-1538. (GECCO 2018 - Proceedings of the 2018 Genetic and Evolutionary Computation Conference). https://doi.org/10.1145/3205455.3205598

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