On Finding Maximum Cardinality Subset of Vectors with a Constraint on Normalized Squared Length of Vectors Sum
In this paper, we consider the problem of finding a maximum cardinality subset of vectors, given a constraint on the normalized squared length of vectors sum. This problem is closely related to Problem 1 from (Eremeev, Kel’manov, Pyatkin, 2016). The main difference consists in swapping the constraint with the optimization criterion.
We prove that the problem is NP-hard even in terms of finding a feasible solution. An exact algorithm for solving this problem is proposed. The algorithm has a pseudo-polynomial time complexity in the special case of the problem, where the dimension of the space is bounded from above by a constant and the input data are integer. A computational experiment is carried out, where the proposed algorithm is compared to COINBONMIN solver, applied to a mixed integer quadratic programming formulation of the problem. The results of the experiment indicate superiority of the proposed algorithm when the dimension of Euclidean space is low, while the COINBONMIN has an advantage for larger dimensions.
KeywordsVectors sum Subset selection Euclidean norm NP-hardness Pseudo-polymonial time
This research is supported by RFBR, projects 15-01-00462, 16-01-00740 and 15-01-00976.
- 2.Borisovsky, P.A., Eremeev, A.V., Grinkevich, E.B., Klokov, S.A., Vinnikov, A.V.: Trading hubs construction for electricity markets. In: Kallrath, J., Pardalos, P.M., Rebennack, S., Scheidt, M. (eds.) Optimization in the Energy Industry, pp. 29–58. Springer, Heidelberg (2009). https://doi.org/10.1007/978-3-540-88965-6_3 CrossRefGoogle Scholar
- 4.Eremeev, A.V., Kel’manov, A.V., Pyatkin, A.V.: On complexity of searching a subset of vectors with shortest average under a cardinality restriction. In: Ignatov, D.I., Khachay, M.Y., Labunets, V.G., Loukachevitch, N., Nikolenko, S.I., Panchenko, A., Savchenko, A.V., Vorontsov, K. (eds.) AIST 2016. CCIS, vol. 661, pp. 51–57. Springer, Cham (2017). https://doi.org/10.1007/978-3-319-52920-2_5 CrossRefGoogle Scholar
- 8.NEPOOL Energy Market Hub White Paper and Proposal. Hub Analysis Working Group NEPOOL Markets Committee (2003)Google Scholar