酉算子

Russell（[17]）曾指出，无限维Hilbert空间中的酉算子群对生成的紧扰动不能使被扰动半群具有指数稳定性。

Russell ( [ 17 ] ) has showed that , a compact perturbation , generated from unitary operator groups in infinite-dimensional linear Hilbert spaces , is unable to make the perturbed semigroup exponentially stable .

∏空间上的酉算子（Ⅰ）

Unitary operators on space π(ⅰ)

紧量子群与乘法酉算子的关系

Relation between compact quantum groups and multiplicative unitary groups

我们证明了，在非交换条件下，能够选择标准正交基向量成为任何固定序的酉算子。

We showed that in noncommutative case , orthonormal base vectors can be chosen to be unitary operators of any fix order .

Bergman位移不酉等价于Toeplitz算子的新证明

Bergman shift is not unitarily equivalent to Toeplitz operator a new proof