On Bergman-Toeplitz operators with commutative symbol algebras
On Bergman-Toeplitz operators with commutative symbol algebras
复制标题
关于具有交换符号代数的 Bergman-Toeplitz 算子
DOI:
10.1007/bf01332495
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发表时间:
1999
影响因子:
0.8
通讯作者:
N. Vasilevski
中科院分区:
文献类型:
--
作者:
N. Vasilevski
AbstractLet
$$\mathbb{D}$$
be the unit disk inℂ,
$$\mathcal{A}^2 (\mathbb{D})$$
be the Bergman space, consisting of all analytic functions from
$$L_2 (\mathbb{D})$$
, and
$$B_\mathbb{D} $$
be the Bergman projection of
$$L_2 (\mathbb{D})$$
onto
$$\mathcal{A}^2 (\mathbb{D})$$
. We constructC*-algebras
$$\mathcal{A} \subset L_\infty (\mathbb{D})$$
, for functions of which the commutator of Toeplitz operators [Ta,Tb]=TaTb−TbTa is compact, and, at the same time, the semi-commutator [Ta,Tb)=TaTb−Tab is not compact.It is proved, that for each finite set ∧=〈n0,n1, ...,nm〉, where 1=n0<n1<...<nm≤∞, andnk ∈ℕ∪ {∞}, there are algebras
$$\mathcal{A}_\Lambda $$
of the above type, such that the symbol algebras Sym
$$\mathcal{T}(\mathcal{A}_\Lambda )$$
of Toeplitz operator algebras
$$\mathcal{T}(\mathcal{A}_\Lambda )$$
arecommutative, while the symbol algebras Sym
$$\mathcal{R}(\mathcal{A}_\Lambda ,B_\mathbb{D} )$$
of the algebras
$$\mathcal{R}(\mathcal{A}_\Lambda ,B_\mathbb{D} )$$
, generated by multiplication operators
$$a \in \mathcal{A}_\Lambda $$
and
$$B_\mathbb{D} $$
, haveirreducible representations exactly of dimensions n0,n1,..., nm.