The Limit of the Empirical Measure of the Product of Two Independent Mallows Permutations

The Mallows measure is a probability measure on $S_n$ where the probability of a permutation $\pi$ is proportional to $q^{l(\pi )}$ with $q>0$ being a parameter and $l(\pi )$ the number of inversions in $\pi$. We show the convergence of the random empirical measure of the product of two independent permutations drawn from the Mallows measure, when $q$ is a function of $n$ and $n(1-q)$ has limit in $\mathbb{R}$ as $n\to \mathrm{\infty }$.