On Variants of Network Flow Stability

10/09/2017

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by   Young-San Lin, et al.

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We present a variant of the stable flow problem. Instead of the traditional flow problem that obeys Kirchhoff's law, for each vertex, the outflow is monotone and piecewise linear to the inflow. In a directed and capacitated network, each vertex has strict preference over their incident edges. A stable flow assignment does not allow a group of vertices to benefit from privately rerouting along a path. In this paper, we first show the existence of flow stability by reducing this variant of stable flow problem to Scarf's Lemma, then introduce a path augmenting algorithm that runs in polynomial time to find such a stable flow.