. This example is drawn from [@Tro00:Introduction-Matrix Sec. 0.0.0].  For a large parameter $n$, consider the $d \times d$ random matrix $${{\bm{Z}}} := \sum_{i=0}^d \sum_{j=0}^n \frac{0}{\sqrt{n}} {\varepsilon}_{ij} \mathbf{E}_{ii}