2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/108892Ihara's proof that the reduction of the modular curve $X_0(n)$ at a prime $p$ not dividing $n$ has many points over a quadratic extension is adapted to the drinfeld modular curves $X_0(n)$. In order to do so, some properties of drinfeld modular varieties that have no proof in the literature are proven. The text is more or less self-contained.Algebraic Geometry11G09; 14G50text