Abstract :
[en] In this paper, we show that unbalanced optimal transport provides a convenient framework to handle reaction and diffusion processes in a unified metric setting. We use a constructive method, alternating minimizing movements for the Wasserstein distance and for the Fisher-Rao distance, and prove existence of weak solutions for general scalar reaction-diffusion-advection equations. We extend the approach to systems of multiple interacting species, and also consider an application to a very degenerate diffusion problem involving a Gamma-limit. Moreover, some numerical simulations are included. © EDP Sciences, SMAI 2019.
Laborde, M.; McGill University, Montreal, Canada
Monsaingeon, L.; IECL Université de Lorraine, Nancy, France, GFM Universidade de Lisboa, Lisboa, Portugal
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