2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205997We find a class of solutions of Einstein's field equations representing spacetime outside a spinning cosmic string surrounded by a gas of non-spinning cosmic strings, and show that there exist closed timelike geodesics in this spacetime.13 pages, 1 figureGeneral Relativity and Quantum Cosmologytext