arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2103.17019math.APmath-phmath.MPmath.PR
收藏

欧氏格上的最优Hardy权

Optimal Hardy weights on the Euclidean lattice

Matthias Keller, Marius Lemm

摘要:

通过构造超解,研究了$\mathbb Z^d$,$d\geq 3$上最优Hardy权的大距离渐近性.对于自由离散Laplacian,Hardy重量渐近是熟悉的$\frac{(d-2)^2}{4}|x|^{-2}$作为$|x|\to\infty$。我们证明了最优Hardy权的平方反比行为对$\mathbb Z^d$上的一般椭圆系数是鲁棒的:(1)大扇区上的平均值具有平方反比标度,(2)对于遍历系数,矩存在逐点平方反比上界,(3)对于i.i.d.系数,则存在匹配的矩的平方反比下界。结果表明,在$\mathbb Z^d$上Rellich权的$|x|^{-4}$ -标度性.类似的结果也是新的连续设置。证明杠杆格林函数估计植根于均匀化理论。

英文摘要:

We investigate the large-distance asymptotics of optimal Hardy weights on $\mathbb Z^d$, $d\geq 3$, via the super solution construction. For the free discrete Laplacian, the Hardy weight asymptotic is the familiar $\frac{(d-2)^2}{4}|x|^{-2}$ as $|x|\to\infty$. We prove that the inverse-square behavior of the optimal Hardy weight is robust for general elliptic coefficients on $\mathbb Z^d$: (1) averages over large sectors have inverse-square scaling, (2), for ergodic coefficients, there is a pointwise inverse-square upper bound on moments, and (3), for i.i.d.\ coefficients, there is a matching inverse-square lower bound on moments. The results imply $|x|^{-4}$-scaling for Rellich weights on $\mathbb Z^d$. Analogous results are also new in the continuum setting. The proofs leverage Green's function estimates rooted in homogenization theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑