2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/162175We show that the L2-Betti numbers of equivalence relations defined by R. Sauer coincide with those defined by D. Gaboriau.10 pages, AMS-LaTeXDynamical SystemsOperator AlgebrasOn the definition of L2-Betti numbers of equivalence relationstext