2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149988We prove: Let $G$ be a finite abelian group acting faithfully on a complex smooth project variety $X$ of general type with numerically effective canonical divisor, of dimension $n$. Then $$|G| \le C(n)K_X^n ,$$ where $C(n)$ depends only on $n$.6 pages plain TeXAlgebraic Geometrytext