Data evento: 
Friday, February 10, 2023 - 14:00

VEN 10 ore 14, MER 15 ore 10, VEN 17 ore 14, MER 22 ore 10, VEN 24 ore 14

AULA 10, RM018

Felix Otto (MPI-MIS, Leipzig)

MINICORSO: Stochastic homogenization and large-scale regularity

ABSTRACT. In this mini-course, I will introduce the concept of large-scale regularity in case of a linear elliptic equation (or system) with heterogeneous coefficients. It is based on a smallness (on average) of the potentials of the harmonic coordinates, and proceeds via an intrinsic Campanato iteration. I will then apply this to the case of a random heterogeneous coefficient field, sampled from a stationary and ergodic ensemble. I will try to be self-contained and closely follow Theorem 1 and Lemma 1 in Gloria, Neukamm, and Otto ``A regularity theory for random elliptic operators'', Milan J Math 2020. 

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