These notes cover a few calculations regarding the sum-rank weight of a matrix in relation to its rank. In particular, a formula and lower bounds are given on the probability that a matrix of rank $t$ consisting of $\ell$ blocks has sum-rank weight $\ell t$.

翻译：这些注记涵盖了矩阵的和秩权与其秩相关的一些计算。特别地，给出了一个由$\ell$个块组成的秩为$t$的矩阵具有和秩权$\ell t$的概率公式及下界。