A “deformation estimate" for the Toeplitz operators on harmonic Bergman spaces

A “deformation estimate" for the Toeplitz operators on harmonic Bergman spaces
复制标题

DOI:
10.1090/s0002-9939-07-08800-4
复制
发表时间:
2007-05
期刊:
--
影响因子:
--
通讯作者:
Congwen Liu
Congwen Liu
中科院分区:
其他
文献类型:
--
作者:
Congwen Liu

文献摘要

相似文献

.设B表示R”中的开单位球,其中n > 2,dx表示R”上的勒贝格体积测度.对于a >-1,(加权)调和Bergman空间B 2,α(B)是L 2(B,(1 - 2))中所有调和函数u的空间|X|(2)α dx)。对f ∈ L ∞(B),定义Toeplitz算子Tf(α)在B 2,α(B)上为Tf(α)u = Qa [fu],其中Q α是L2(B,(1 - 2))的正交投影|X| 2)α dx)到B 2,α(B)上。本文证明了对f ∈ C(B)n L∞(B)径向,lim α→∞|| T f(α)|| = ||F|| ∞.
. Let B denote the open unit ball in R" for n > 2 and dx the Lebesgue volume measure on R". For a > -1, the (weighted) harmonic Bergman space b 2,α (B) is the space of all harmonic functions u which are in L2(B,(1 - |x| 2 ) α dx). For f ∈ L ∞ (B), the Toeplitz operator T f (α) is defined on b 2, α(B) by T f (α) u = Q a [fu], where Q α is the orthogonal projection of L 2 (B,(1 - |x| 2 ) α dx) onto b 2,α (B). In this note, we prove that for f ∈ C(B) n L∞(B) radial, lim α→∞ ||T f (α) || = ||f||∞.