Conservation of Short-term Flows: Signed Optimal Transport

Jiaxing Weng

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arXiv · 2608.17363

Conservation of Short-term Flows: Signed Optimal Transport

Jiaxing Weng

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Abstract

This paper develops a theoretical framework for signed optimal transport. A global flatness measure induced by the continuum transport equation serves as the regularizer. We examine transport networks from a harmonic analysis perspective, prove the existence and uniqueness of the optimal coupling in the variational problem, and provide an algorithmic scheme that guarantees lossless information transport under bi-marginal constraints. To bridge theory with practice, we design an empirical analysis framework for the resulting optimal estimators, which is sufficiently general to accommodate both time-series and panel-structural analyses of the network, owing to the intrinsic invariance properties of locally compact abelian groups.

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Jiaxing Weng. 2026-08-18. Conservation of Short-term Flows: Signed Optimal Transport. https://arxiv.org/abs/2608.17363

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