2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34282The gedanken-experiment of Einstein's lift is analyzed in order of determining whether the free-falling observer inside the lift can detect the eventual topological non-triviality of space-timeGeneral Relativity and Quantum CosmologyEinstein's lifts and topologies: topological investigations on the Principle of Equivalencetext