Dobado González, AntonioLópez, A2023-06-202023-06-201993-10-010370-269310.1016/0370-2693(93)90322-9https://hdl.handle.net/20.500.14352/58748We consider the minimal low-energy action for gravity up to six derivatives which is renormalizable at the two-loop level modulo higher derivative corrections. Then we study the classical solutions corresponding to the Schwarzschild and the Robertson-Walker metrics. In the first case we find a singularity close to the gravitational radius and in the second case we find inflationary de Sitter solutions in absence of any matter or cosmological constant.engjournal articlehttp://dx.doi.org/10.1016/0370-2693(93)90322-9http://www.sciencedirect.comhttp://arxiv.org/abs/hep-ph/9309221open access53Chiral Perturbation-TheoryQuantum-GravityOne-LoopFísica (Física)22 Física