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- W2952202206 abstract "We prove the NP-completeness of the integer multiflow problem in planar graphs, with the following restrictions: there are only two demand edges, both lying on the infinite face of the routing graph. This was one of the open challenges concerning disjoint paths, explicitly asked by Muller. It also strengthens Schwarzler's recent proof of one of the open problems of Schrijver's book, about the complexity of the edge-disjoint paths problem with terminals on the outer boundary of a planar graph. We also give a directed acyclic reduction. This proves that the arc-disjoint paths problem is NP-complete in directed acyclic graphs, even with only two demand arcs." @default.
- W2952202206 created "2019-06-27" @default.
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- W2952202206 date "2009-11-16" @default.
- W2952202206 modified "2023-09-27" @default.
- W2952202206 title "The hardness of routing two pairs on one face" @default.
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