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arXiv · 1703.10718

Quasi-invariant Gaussian measures for the two-dimensional defocusing cubic nonlinear wave equation

Tadahiro Oh·Nikolay Tzvetkov
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Abstract

We study the transport properties of the Gaussian measures on Sobolev spaces under the dynamics of the two-dimensional defocusing cubic nonlinear wave equation (NLW). Under some regularity condition, we prove quasi-invariance of the mean-zero Gaussian measures on Sobolev spaces for the NLW dynamics. We achieve this goal by introducing a simultaneous renormalization on the energy functional and its time derivative and establishing a renormalized energy estimate in the probabilistic setting.

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Tadahiro Oh, Nikolay Tzvetkov. 2017-03-31. Quasi-invariant Gaussian measures for the two-dimensional defocusing cubic nonlinear wave equation. https://arxiv.org/abs/1703.10718

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