关于加权位移的酉等价问题

In this paper, we study the unilateral weighted shift which is unitarily equivalent to a Toeplitz operator and prove a similar result to that in [ 1 ] without the hypothesis that the shift must be hyponormal. As a corollary, we show that if the weight sequence {a_n}_n=0^∞ of the shift is convergent, then 1-a_n²=(1-a₀²)ⁿ⁺¹ ?n≥0     

Banach代数A=上左(右)乘子的Fredholm定理

本文得到了某些不可换Banach代数上左（右）乘子的Fredholm定理．作为应用,我们刻划了紧群上的Mredholm左（右）乘子．     

Banach代数A=上左(右)乘子的Fredholm定理

本文得到了某些不可换Banach代数上左（右）乘子的Fredholm定理．作为应用，我们刻划了紧群上的Mredholm左（右）乘子．     

Banach代数A=A上左(右)乘子的Fredholm定理

本文得到了某些不可换Banach代数上左(右)乘子的Fredholm定理.作为应用,我们刻划了紧群上的Fredholm左(右)乘子.