讨论了Dirichlet空间上的某一类分式线性复合算子与紧算子生成的C^*-代数C^*(Cφ,K),证明了此类C^*-代数有短正合序列:0→K(D)→C^*(Cφ,K)→Μ2→0.
This paper mainly describes the C^*-algebra C^* (Cφ,K) generated by the associated composition oper- ators with a special class of linear-fractional symbol and the compact operators. It proves that C^* (Cφ,K) possesses a short exact sequence 0 → K(D) →C^* (Cφ,K) → Μ2 → 0.