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Updated: Aug 20, 2025

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Published on: April 25, 2025
Bilevel optimization in flow networks: A message-passing approach
Bo Li1,2, David Saad1, Chi Ho Yeung3
1Non-linearity and Complexity Research Group, Aston University, Birmingham B4 7ET, United Kingdom.
Abstract:
Optimizing embedded systems, where the optimization of one depends on the state of another, is a formidable computational and algorithmic challenge, that is ubiquitous in real world systems. We study flow networks, where bilevel optimization is relevant to traffic planning, network control, and design, and where flows are governed by an optimization requirement subject to the network parameters. We employ message passing algorithms in flow networks with sparsely coupled structures to adapt network parameters that govern the network flows, in order to optimize a global objective. We demonstrate the effectiveness and efficiency of the approach on randomly generated graphs.
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