2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/24031Classic and recent results for the critical behaviour of ideal Bose gas at constant volume and constant pressure and for various spatial dimensionalities d>0 are reviewed. New results about the critical properties in a close vicinity of the $λ-$point are presented.8 pages, 3 figures, 2 tablesStatistical Mechanicstext