主要计算了有界连通区域的Dirichlet空间上Toeplitz算子的Fredholm指标,并得到了符号在C^1(M)中Toeplitz算子生成C^*-代数的K群。
In this paper, Fredholm index of Toeplitz operators on Dirichlet spaces is calculated, and the K-group of C^*-algebra generated by Toeplitz opertors whose symbol function being in C^1(M) is obtained.