2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53337Einstein Gravity in 2+1 dimensions arises as a consequence of the equations of motion of a gauge model in an external metric. Newton's constant appears as an order parameter of a spontaneously broken discrete symmetry. Matter is coupled in a straightforward way.10 pages, MIT preprint CTP#2129High Energy Physics - TheoryGeneral Relativity and Quantum Cosmologytext