本文主要讨论了有界连通区域Dirichlet空间上Toeplitz算子的Fredholm性质,计算了符号在C^1中的Toeplitz算子的本性谱和Fredholm指标。
In this paper, the Fredholm properties of some Toeplitz operators on Dirichlet space are discussed, and the essential spectra of Toeplitz operators with symbols in C^1 are computed.