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- W3212436327 abstract "For a binary integer program (IP) max cTx,Ax≤b,x∈{0,1}n, where A∈Rm×n and c∈Rn have independent Gaussian entries and the right-hand side b∈Rm satisfies that its negative coordinates have l2 norm at most n/10, we prove that the gap between the value of the linear programming relaxation and the IP is upper bounded by poly(m)(logn)2/n with probability at least 1−2/n7−2−poly(m). Our results give a Gaussian analogue of the classical integrality gap result of Dyer and Frieze (Math. of O.R., 1989) in the case of random packing IPs. In constrast to the packing case, our integrality gap depends only polynomially on m instead of exponentially. Building upon recent breakthrough work of Dey, Dubey and Molinaro (SODA, 2021), we show that the integrality gap implies that branch-and-bound requires npoly(m) time on random Gaussian IPs with good probability, which is polynomial when the number of constraints m is fixed. We derive this result via a novel meta-theorem, which relates the size of branch-and-bound trees and the integrality gap for random logconcave IPs." @default.
- W3212436327 created "2021-11-22" @default.
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- W3212436327 date "2021-05-05" @default.
- W3212436327 modified "2023-10-16" @default.
- W3212436327 title "On the integrality gap of binary integer programs with Gaussian data" @default.
- W3212436327 hasPublicationYear "2021" @default.
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