2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52996We recast the action principle of four dimensional General Relativity so that it becomes amenable for perturbation theory which doesn't break general covariance. The coupling constant becomes dimensionless (G_{Newton} Λ) and extremely small 10^{-120}. We give an expression for the generating functional of perturbation theory. We show that the partition function of quantum General Relativity can be expressed as an expectation value of a certain topologically invariant observable. This sets up a framework in which quantum gravity can be studied perturbatively using the techniques of topological quantum field theory.19 pagesHigh Energy Physics - TheoryGeneral Relativity and Quantum Cosmologytext