On Elliptic boundary value problems with indefinite weights: variational formulations of the principal eigenvalue and applications
Fethi Bin Muhammad Belgacem · 1994
Modelling Diffusion and Boundary Conditions Existence, Coercivity and Monotonicity Results The Case of Potential-Based Drift Degenerate Elliptic Equations Minimax Formulations of the Principal Eigenvalue for Indefinite Weights Appendix Preliminaries