报告主题：Iterated Spherical Averages On Lebesgue Spaces
报告人：范大山 教授 University of Wisconsin-Milwaukee
报告时间：2019 年 11 月 21 日（周 四）15:00-16:00
报告地点：校本部 G507
邀请人：赵发友
报告摘要：
For the spherical average A and the Laplace operator Δ, in this talk we will introduce the iterated operator Δ(A)^{N} and find the minimal positive integer N to ensure the L^1(R^n) boundedness of Δ(A)^{N}. Using a constructive proof, we completely solve a question posted by Belinsky, Dai and Ditzian posed in 2003.
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