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- W2950652216 abstract "We consider a generalization of the unsplittable maximum two-commodity flow problem on undirected graphs where each commodity $iin{1,2}$ can be split into a bounded number $k_i$ of equally-sized chunks that can be routed on different paths. We show that in contrast to the single-commodity case this problem is NP-hard, and hard to approximate to within a factor of $alpha>1/2$. We present a polynomial time 1/2-approximation algorithm for the case of uniform chunk size over both commodities and show that for even $k_i$ and a mild cut condition it can be modified to yield an exact method. The uniform case can be used to derive a 1/4-approximation for the maximum concurrent $(k_1,k_2)$-splittable flow without chunk size restrictions for fixed demand ratios." @default.
- W2950652216 created "2019-06-27" @default.
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- W2950652216 creator A5065103963 @default.
- W2950652216 date "2011-05-30" @default.
- W2950652216 modified "2023-09-23" @default.
- W2950652216 title "A Polynomial Time Approximation Algorithm for the Two-Commodity Splittable Flow Problem" @default.
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