共查询到17条相似文献,搜索用时 88 毫秒
1.
2.
,该文讨论多圆盘上Hardy空间上的Toeplitz算子,使用Berezin变换和调和扩张给出两个Toeplitz算子交换的一个充要条件. 相似文献
3.
4.
该文研究了Dirichlet空间Dp~(1< p<∞)上Toeplitz算子的紧性与Fredholm性质, 计算了Dp上Toeplitz算子的Fredholm指标. 还考查了Dp上Hankel算子紧性. 相似文献
5.
6.
主要讨论了:(1)圆环上Dirichlet空间D~p(1P+∞),以φ∈L~(∞,1)为符号的Toeplitz算子T_φ的紧性等价条件-T_φ的Berezin变换在圆环的两边界上为0;(2)圆环上Dirichlet空间D~2,以u∈C~1(M)为符号的Toeplitz算子T_u的性质,并得到典型分解式:S=T_S+R,其中R为换位子,S=T_(uij). 相似文献
7.
若S是Dirichlet空间上有限个Toeplitz算子乘积的有限和, S为紧算子的充要条件是: 当z→∂D时, S的Berezin型变换收敛到0; 若S是Dirichlet空间上Hankel算子, S为紧算子的充要条件是: 当z→ D时, S作用在类再生核上按范数收敛到0. 相似文献
8.
9.
于涛 《数学年刊A辑(中文版)》2005,(3)
本文讨论了多连通域的Bergman空间上的以正测度为符号的Toeplitz算子.用符号测度的Berezin 变换和平均函数刻画了Toeplitz算子为Schatten类算子的充要条件. 相似文献
10.
该文在Cn中单位球上讨论了Zygmund 型空间(小Zygmund 型空间)之间的加权Cesàro 算子Tg 的有界性和紧性特征, 得到了以下的结果: (1) Tg 是Zp 到Zq的有界算子或紧算子的充要条件; (2) Tg 是 Zp0 到Zq0 的有界算子或紧算子的充要条件. 相似文献
11.
In this paper, we study positive Toeplitz operators on the harmonic Bergman space via their Berezin transforms. We consider the Toeplitz operators with continuous harmonic symbols on the closed disk and show that the Toeplitz operator is positive if and only if its Berezin transform is nonnegative on the disk. On the other hand, we construct a function such that the Toeplitz operator with this function as the symbol is not positive but its Berezin transform is positive on the disk. We also consider the harmonic Bergman space on the upper half plane and prove that in this case the positive Toeplitz operators with continuous integrable harmonic symbols must be the zero operator. 相似文献
12.
探讨了C^n中单位球面S上Berezin变换和Toeplitz算子的性质,证明了由{Tφ,φ∈L^∞ (S)}所生成的C^*-代数中算子T的符号恰好为单位球B上函数T(称为T的Berezin变换)的非切向边界值.此外,本文还得到了经典Toeplitz符号演算的有趣推广. 相似文献
13.
For an operator which is a finite sum of products of finitely many Toeplitz operators on the harmonic Bergman space over the half-space, we study the problem: Does the boundary vanishing property of the Berezin transform imply compactness? This is motivated by the Axler-Zheng theorem for analytic Bergman spaces, but the answer would not be yes in general, because the Berezin transform annihilates the commutator of any pair of Toeplitz operators. Nevertheless we show that the answer is yes for certain subclasses of operators. In order to do so, we first find a sufficient condition on general operators and use it to reduce the problem to whether the Berezin transform is one-to-one on related subclasses. 相似文献
14.
Namita Das 《印度理论与应用数学杂志》2010,41(2):379-400
In this paper the concept of asymptotic Toeplitz and asymptotic Hankel operators on the Bergman space are introduced and properties of these classes of operators are studied. The importance of this notion is that it associates with a class of operators a Toeplitz operator and with a class of operators a Hankel operator where the original operators are not even Toeplitz or Hankel. Thus it is possible to assign a symbol to an operator that is not Toeplitz or Hankel and hence a symbol calculus is obtained. Further a relation between Toeplitz operators and little Hankel operators on the Bergman space is established in some asymptotic sense. 相似文献
15.
We discuss Toeplitz operators on Fock-Sobolev space with positive measure symbols.By FockCarleson measure,we obtain the characterizations for boundedness and compactness of Toeplitz operators.We also give some equivalent conditions of Schatten p-class properties of Toeplitz operators by Berezin transform. 相似文献
16.
WANG CHUN-MEI 《东北数学》2009,25(2):165-176
For any given symmetric measure μ on the closed unit disk D, we apply the Berezin transform to characterizing semi-commuting and commuting Toeplitz operators with bounded harmonic symbols on A2(D, dμ). 相似文献