Journal:
:Journal of Inequalities and Applications2021
Abstract In this paper, we focus on a $2 \times 2$ 2 × operator matrix $T_{\epsilon _{k}}$ T ϵ k as follows: $$\begin{aligned} T_{\epsilon _{k}}= \begin{pmatrix} A & C \\ \epsilon _{k} D B\end{pmatrix}, \end{aligned...
