Abstract
The problem of minimizing a supermodular set function is considered. A special case of this problem is the well-known NP-hard minimization p-median problem. The main results of the paper are tight a priori and a posteriori bounds on worst-case behaviour of a “reverse” greedy (steepest descent) algorithm of minimizing a supermodular set function on comatroid. As a corollary, approximation guarantees of this algorithm for the general minimization p-median problem improving the known bounds are obtained.
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The research of the first author was supported by the RSF grant 17-11-01117.
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Il’ev, V., Il’eva, S. (2018). On Minimizing Supermodular Functions on Hereditary Systems. In: Eremeev, A., Khachay, M., Kochetov, Y., Pardalos, P. (eds) Optimization Problems and Their Applications. OPTA 2018. Communications in Computer and Information Science, vol 871. Springer, Cham. https://doi.org/10.1007/978-3-319-93800-4_1
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