Exponential convergence for ultrafast diffusion in R^n with Gaussian weights is proved by a direct Poincaré inequality, extending prior one-dimensional results.
Intertwinings, second-order brascamp--lieb inequalities and spectral estimates
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On the exponential convergence to equilibrium for ultrafast diffusion equations
Exponential convergence for ultrafast diffusion in R^n with Gaussian weights is proved by a direct Poincaré inequality, extending prior one-dimensional results.