2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/194014We discuss the existence and properties of a nontrivial fixed point in f(R)-gravity, where f is a polynomial of order up to six. Within this seven-parameter class of theories, the fixed point has three ultraviolet-attractive and four ultraviolet-repulsive directions; this brings further support to the hypothesis that gravity is nonperturbatively renormalizabile.4 pagesHigh Energy Physics - TheoryGeneral Relativity and Quantum Cosmologytext