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- W4288043489 abstract "Using the method of paracontrolled distributions, we show the local well-posedness of an additive noise approximation to the fluctuating hydrodynamics of the Keller-Segel model on the two-dimensional torus. Our approximation is a non-linear, non-local, parabolic-elliptic stochastic PDE with an irregular, heterogeneous space-time noise. As a consequence of the irregularity and heterogeneity, solutions to this equation must be renormalised by a sequence of diverging fields. Using the symmetry of the elliptic Green's function, which appears in our non-local term, we establish that the renormalisation diverges at most logarithmically, an improvement over the linear divergence one would expect by power counting. Similar cancellations also serve to reduce the number of diverging counterterms." @default.
- W4288043489 created "2022-07-27" @default.
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- W4288043489 date "2022-07-21" @default.
- W4288043489 modified "2023-10-14" @default.
- W4288043489 title "An Additive Noise Approximation to Keller-Segel-Dean-Kawasaki Dynamics Part I: Local Well-Posedness of Paracontrolled Solutions" @default.
- W4288043489 doi "https://doi.org/10.48550/arxiv.2207.10711" @default.
- W4288043489 hasPublicationYear "2022" @default.
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