2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51729Classical geometry of de Sitter spacetime is reviewed in arbitrary dimensions. Topics include coordinate systems, geodesic motions, and Penrose diagrams with detailed calculations.40 pages, 12 figures (ps or eps)High Energy Physics - TheoryAstrophysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenologytext