2 problems

Let $\mathbf{D}=\operatorname{diag}(d_1,\ldots,d_n)$ with $d_i>0$, and suppose the conditions of Theorem 22 hold. For each $\tau\geq 0$, let … where…

Let $\mathbf{D}=\operatorname{diag}(d_1,\ldots,d_n)$ with $d_i>0$, and suppose the conditions of Theorem 22 hold: $\lambda^*(\mathbf{D}^{-1}\mathbf{Q}_m)>1$ for every…