共查询到19条相似文献,搜索用时 125 毫秒
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设Ω={Z∈C:R<|z|<1}(0< R< 1)是复平面 C上的圆环,L2a(Ω)是Ω的 Bergman空 间,D是L2a(Ω)上的所有Toeplitz算子生成的B(L2a(Ω))的闭子代数.本文证明了对任何非零整数 n,{Tzn}’∩D是所有解析Toeplitz算子.同时,刻划了圆环上以逐段连续函数为符号的Toeplitz算 子本质谱. 相似文献
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Bergman空间上Toeplitz算子的局部及Fredholm性质 总被引:1,自引:0,他引:1
本文讨论了Bergman空间上Toeplitz算子的局部谱的关系.利用局部化原理给出了Toeplitz算子拟换位子紧性的一个充分条件.给出了一类符号的Toeplitz算子是Fredholm算子的充分条件. 相似文献
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Dirichlet空间上Toeplitz算子的紧性 总被引:1,自引:0,他引:1
本文给出了 Dirichlet空间上 Toelpitz算子为紧算子的充要条件,并证明具有 C1-符号的 Toeplitz算子为紧算子当且仅当它为零算子,当且仅当符号的边值为零. 相似文献
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西方给出了C^n中单位球上的带权的Bergman空间上具一般符号的Toeplitz算子和Hankel算子为紧的充要条件。 相似文献
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本文研究加权Bergman空间A(p,α)(B)(p>1)上Toeplitz与Hankel算子的紧性.证明了符号属于L∞(B)的Toeplitz与Hankel算子的紧性与作用空间Ap,α(B)无关 相似文献
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解析Toeplitz代数的本质换位及其相关问题 总被引:1,自引:1,他引:0
在本文中,我们决定出多复变Hardy空间H2上解析Toeplitz代数的本质换位.即一个算子与所有解析Toeplitz算子本质可换,当且仅当它是符号属于Ac的Toeplitz算子的紧扰动.由此,符号属于Ac的Toeplitz算子生成的代数F(Ac)在Calkin代数中的像是极大可换闭代数,这导致了L.Coburn正合列的极大扩充.从这个事实,证明了符号属于Ac的Toeplitz算子的本质谱是连通的,这大大改进了C-S最近的工作.从本文的主要定理,证明了Toeplitz代数F(L∞)的本质换位和本质中心是由符号属于QC的Toeplitz算子生成的代数F(QC),这些结果又导致了对代数F(H∞)+K自同构群的确定. 相似文献
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Yong Chen 《Journal of Mathematical Analysis and Applications》2009,357(1):214-224
In this paper, we study the commutativity of Toeplitz operators with continuous symbols on the Dirichlet space. First, under a mild condition concerning absolute continuity we characterize (semi-)commuting Toeplitz operators. This is a generalization of the case of harmonic symbols. Also, if one of the symbol is radial or analytic, we get another characterization, which is different from the case on the Bergman space. 相似文献
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讨论单位圆盘中Dirichlet空间上Toeplitz算子的性质,给出了Dirichiet空间上以一类连续函数为符号的Toeplitz算子满足亚正规性的充分必要条件. 相似文献
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For the complete algebra of two-dimensional Töplitz operators with measurable bounded symbols, we establish conditions necessary for the Fredholm property of the operators and prove results on the separation of singularities of the symbols. As a corollary, conditions sufficient for the Fredholm property are established for operators with symbols satisfying local conditions of sectorial type. 相似文献
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《Journal of Functional Analysis》2023,284(4):109778
We prove a new criterion that guarantees self-adjointness of Toeplitz operators with unbounded operator-valued symbols. Our criterion applies, in particular, to symbols with Lipschitz continuous derivatives, which is the natural class of Hamiltonian functions for classical mechanics. For this we extend the Berger-Coburn estimate to the case of vector-valued Segal-Bargmann spaces. Finally, we apply our result to prove self-adjointness for a class of (operator-valued) quadratic forms on the space of Schwartz functions in the Schrödinger representation. 相似文献
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Josh Isralowitz 《Journal of Mathematical Analysis and Applications》2011,374(2):554-557
In this note, we show that Miao and Zheng's characterization of compact operators on the Bergman space of the unit disk that are finite sums of finite products of Toeplitz operators (with each one of the symbols belonging to BT) also holds for the Segal-Bargmann space of Cn. 相似文献
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In this paper, we first investigate the finite-rank product problem of several Toeplitz operators with quasihomogeneous symbols on the harmonic Bergman space. Next, we characterize finite rank commutators and semi-commutators of two Toeplitz operators with quasihomogeneous symbols. 相似文献
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讨论C~m上Fock空间之正交补空间上以平方可积函数为符号的对偶Toeplitz算子,并给出其有界性与紧性的等价判别条件. 相似文献
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Lian Kuo Zhao 《数学学报(英文版)》2012,28(5):1033-1040
In this paper, we study Toeplitz operators with harmonic symbols on the harmonic Dirichlet space, and show that the product
of two Toeplitz operators is another Toeplitz operator only if one factor is constant. 相似文献