Ascent and descent of bounded linear operators

Xiaofei Qi, Xiaoshuo Feng, Bing Xu +1

Let $\mathcal{B}(\mathcal{X})$ be the algebra of all bounded linear operators on a real or complex Banach space $\mathcal{X}$ with $\dim \mathcal{X}\ge 3$. In this paper, we first exp…