2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52314We work out the phase-space functional integral of the gravitational field in 2+1 dimensions interacting with N point particles in an open universe.3 pages, LaTeX, contribution to the X Marcel Grossmann Meeting on General Relativity, Rio de Janeiro, July 20-26, 2003High Energy Physics - TheoryGeneral Relativity and Quantum Cosmologytext