2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/220247The existence of positive equilibrium solutions to age-dependent population equations with nonlinear diffusion is studied in an abstract setting. By introducing a bifurcation parameter measuring the intensity of the fertility it is shown that a branch of (positive) equilibria bifurcates from the trivial equilibrium. In some cases the direction of bifurcation is analyzed.15 pagesAnalysis of PDEs35K55; 35K90; 92D25text