2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/223294We study the renormalization of the effective mass and trigonal warping of bilayer graphene by the electron-electron interaction. One consequence of such a renormalization in the low-energy bands of a bilayer crystal consists of a small reduction of the critical density of the Lifshitz transition (the crossover between the single-pocket and four-pocket topology of the Fermi surface).4 pages, 3 figuresMesoscale and Nanoscale PhysicsOther Condensed Mattertext