arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.3487math.FAmath.CV
收藏

BMOA上的紧与弱紧复合算子

Compact and weakly compact composition operators on BMOA

Jussi Laitila, Pekka J. Nieminen, Eero Saksman, Hans-Olav Tylli

摘要:

证明了由复平面上单位圆盘的解析自映射导出的复合算子在BMOA空间上是弱紧的,当该复合算子在BMOA空间上是紧的时,该复合算子在BMOA空间上也是弱紧的。作为一个关键的步骤,我们简化了紧凑性标准,由于史密斯的复合经营者BMOA,并表明,他的条件Nevanlinna计数函数单独的特点紧凑。此外,还建立了BMOA及其子空间VMOA上复合算子的其它等价紧性准则。

英文摘要:

We show that a composition operator induced by an analytic self-map of the unit disc in the complex plane is weakly compact on the space BMOA precisely when the operator is compact on BMOA. As a crucial step we simplify the compactness criterion due to Smith for composition operators on BMOA and show that his condition on the Nevanlinna counting function alone characterizes compactness. In addition, other equivalent compactness criteria are established for composition operators on both BMOA and its subspace VMOA.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑