2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74717We introduce a topological approach to words. Words are approximated by Gauss words and then studied up to natural modifications inspired by homotopy transformations of curves on the plane.59 pages, 4 figures. In the second version I added a discussion of the S-homotopy of words (Section 2)CombinatoricsGeometric Topology68R15; 57M99text