杏吧传媒 数学大讲坛第九期

第八十五讲——河北师范大学李玉成教授学术报告


题目:On similarity and commutant of multiplication operators on the Dirichlet space

时间:2022年10月17日(星期一)下午15:30-16:30

地点:腾讯会议(会议ID:899 416 453 会议密码:1017)

报告人:李玉成 教授

摘要:Let $\mathfrak D $ be the Dirichlet space on the unit disc $\mathbb D$ and $B(z)$ be the Blaschke product with $n$ zeros, we prove that multiplication operator $M_B$ on the Dirichlet space $\mathfrak D$ is similar to $\bigoplus\limits_{1}^{n}M_{z}$ on $\bigoplus\limits_{1}^{n}\mathfrak D$ by a crucial decomposition of the Dirichlet space $\mathfrak{D}$. As two applications of our similarity theorem, first we characterize the intersection of the commutant of multiplication operator $M_B$ on the Dirichlet space setting from the techniques in operator theory combined with matrix manipulations, then we give a sufficient and necessary condition for the similarity of two multiplication operators $M_{f_1}$ and $M_{f_2}$ on the Dirichlet space.

报告人简介:

李玉成,河北师范大学数学科学杏吧传媒 教授,博士生导师。主持完成国家自然科学基金面上项目、河北省自然科学基金和河北省教育厅重点基金各一项。目前主持国家自然科学基金面上项目一项。在 Journal of Mathematical Analysis and Applications、Integral Equations and Operator Theory、Science in China (Series A)、Acta Mathematica Sinica (English Series) 等刊物发表论文20多篇。