2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/68522We define a numerical quasi-isometry invariant of a finitely generated group, whose values parametrize the difference between the group being uniformly embeddable in a Hilbert space and the reduced C*-algebra of the group being exact.20 pages, LatexOperator AlgebrasGroup Theory46L05;20F65Exactness and uniform embeddability of discrete groupstext