21 citations · 21 across the 3 of their papers we have counts for
4 papers
On the power set of quasinilpotent operators
Youqing Ji, Yuanhang Zhang
For a quasinilpotent operator on a separable Hilbert space , Douglas and Yang define $k_x=\limsup\limits_{λ\rightarrow 0}\frac{\ln\|(λ-T)^{-1}x\|}{\ln\|(λ-T)^{-1}\…
An example of weakly amenable and character amenable operator
Luo Yi Shi, YU Jing Wu, You Qing Ji
A complete characterization of Hilbert space operators that generate weakly amenable algebras remains open, even in the case of compact operator. Farenick, Forrest and Marcoux prop…
Invariant and hyperinvariant subspaces for amenable operators
Luo Yi Shi, Yu Jing Wu, You Qing Ji
There has been a long-standing conjecture in Banach algebra that every amenable operator is similar to a normal operator. In this paper, we study the structure of amenable operator…
Topological Stable Rank of Nest Algebras
Kenneth R. Davidson, You Qing Ji
We establish a general result about extending a right invertible row over a Banach algebra to an invertible matrix. This is applied to the computation of right topological stable r…