时间：9月18日（周三）10：00—11：00

地点：仓前校区勤园21-306

主讲人：Young Joo Lee，教授，韩国，Chonnam National University。

内容简介：We consider dual Toeplitz operators acting on the orthogonal complements of two kinds of Dirichlet spaces on the unit ball. We first characterize the compactness for operators which are finite sums of dual Toeplitz products. Next, we give a characterization of when a finite sum of products of two dual Toeplitz operators is another dual Toeplitz operator. Our results show that there are similarities and differences between the results on two spaces. Also our results extend several known results by providing unified ways of treating them.