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arXiv · 2609.38849

Quantitative homogenization and large-scale regularity for nondivergence-form equations under a critical ellipticity moment

Jizu Huang·Yong Ma
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Abstract

We prove quantitative homogenization estimates for linear elliptic equations in nondivergence form with stationary, symmetric coefficients, finite range of dependence, and a deterministic upper ellipticity bound. No deterministic positive lower bound is imposed. We assume that the reciprocal of the infimum of the smallest eigenvalue on a unit ball has a finite moment of order $d$, together with the common continuity condition of Armstrong and Smart. Under these assumptions, we obtain algebraic probability bounds for finite-cell errors and for Dirichlet homogenization errors with nonzero sources. We construct quadratic correctors on the whole space, modulo affine functions, and prove first- and second-order large-scale regularity and the corresponding Liouville theorems. We also identify the effective matrix through the invariant density and quantify smooth spatial averages of the density and the weighted coefficients. The proof separates a unit-trace diffusion from its physical clock. A reverse Hölder estimate for the Green function of a stopped coarse process yields the integrability gain needed to control the clock at the critical moment. Applications include weighted gradient convergence and a finite-domain approximation of the effective matrix.

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Jizu Huang, Yong Ma. 2026-09-30. Quantitative homogenization and large-scale regularity for nondivergence-form equations under a critical ellipticity moment. https://arxiv.org/abs/2609.38849

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