2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/122117Classical particle-like solutions of field equations such as general relativity, could account for dark matter. Such particles would not interact quantum mechanically and would have negligible interactions apart from gravitation. As a relic from the big bang, they would be a candidate for cold dark matter consistent with observations.5 pagesGeneral Relativity and Quantum Cosmologytext