Abstract
The computational complexity of counting the number of matchings of size k in a given triple set remains open, and it is conjectured that the problem is infeasible. In this paper, we present a fixed parameter tractable randomized approximation scheme (FPTRAS) for the problem. More precisely, we develop a randomized algorithm that, on given positive real numbers ε and δ, and a given set S of n triples and an integer k, produces a number h in time O(5.483k n 2 ln (2/δ)/ε 2) such that
where h 0 is the total number of matchings of size k in the triple set S. Our algorithm is based on the recent improved color-coding techniques and the Monte-Carlo self-adjusting coverage algorithm developed by Karp and Luby.
This work is supported by the National Natural Science Foundation of China (60433020) and the Program for New Century Excellent Talents in University (NCET-05-0683)
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Liu, Y., Chen, J., Wang, J. (2007). A Randomized Approximation Algorithm for Parameterized 3-D Matching Counting Problem. In: Lin, G. (eds) Computing and Combinatorics. COCOON 2007. Lecture Notes in Computer Science, vol 4598. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73545-8_35
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DOI: https://doi.org/10.1007/978-3-540-73545-8_35
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