$SL_2(k)$ and a Subset of Words over $k$

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/125688This paper studies a subset of the free semi-group $F_k$ with letters in a field $k$ which has some interesting arithmetic and combinatorial properties.Combinatorics$SL_2(k)$ and a Subset of Words over $k$text