The 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.
Boundedness in a chemotaxis-haptotaxis model with nonlinear diffusion
Bifurcation of Positive Equilibria in Nonlinear Structured Population Models with Varying Mortality Rates
Global very weak solutions to a chemotaxis-fluid system with nonlinear diffusion
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