2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/161101We give some new advances in the research of the maximum number of triangles that we may obtain in a simple arrangements of n lines or pseudo-lines.12 pages, 9 figuresCombinatorics52B05; 52C30; 68U05On simple arrangements of lines and pseudo-lines in P^2 and R^2 with the maximum number of trianglestext