Square-section braid groups and Higman-Neumann-Neumann extensions

Omar Alvarado-Garduño, Jesús González

For positive integers $n$, $p$ and $q$ with $pq-n>0$, let $UC(n,p\times q)$ denote the configuration space of $n$ unlabelled hard unit squares in the rectangle $[0,p]\times [0,q]$,…