2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/108852In a preprint from 1982, John Milnor formulated various fundamental questions concerning infinite-dimensional Lie groups. In this note, we describe some of the answers (and partial answers) obtained in the preceding years.13 pages, LaTeXGroup TheoryFunctional Analysis22E65text