A “deformation estimate" for the Toeplitz operators on harmonic Bergman spaces
A “deformation estimate" for the Toeplitz operators on harmonic Bergman spaces
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DOI:
10.1090/s0002-9939-07-08800-4
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发表时间:
2007-05
期刊:
影响因子:
--
通讯作者:
Congwen Liu
中科院分区:
文献类型:
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作者:
Congwen Liu
. 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||∞.