An Overview of the Method of Lower and Upper Solutions for ODEs -- On the Long-time Behaviour of Solutions to the Navier-Stokes Equations of Compressible Flow -- Periodic Solutions of Systems with p-Laplacian-like Operators -- Mechanics on Riemannian Manifolds -- Twist Mappings, Invariant Curves and Periodic Differential Equations -- Variational Inequalities, Bifurcation and Applications -- Complex Dynamics in a Class of Reversible Equations -- Symmetry and Monotonicity Results for Solutions of Certain Elliptic PDEs on Manifolds -- Nielsen Number and Multiplicity Results for Multivalued Boundary Value Problems -- Bifurcation Theory and Application to Semilinear Problems near the Resonance Parameter -- Orientation and Degree for Fredholm Maps of Index Zero Between Banach Spaces -- On the Method of Upper and Lower Solutions for First Order BVPs -- Nonlinear Optimal Control Problems for Diffusive Elliptic Equations of Logistic Type -- On The Use of Time-Maps in Nonlinear Boundary Value Problems -- Some Aspects of Nonlinear Spectral Theory -- Asymmetric Nonlinear Oscillators -- Hopf Bifurcation for a Delayed Predator-Prey Model and the Effect of Diffusion -- Galerkin-Averaging Method in Infinite-Dimensional Spaces for Weakly Nonlinear Problems -- PBVPs for Ordinary Impulsive Differential Equations -- Homoclinic and Periodic Solutions for Some Classes of Second Order Differential Equations -- Global Bifurcation for Monge-Ampรจre Operators -- Remarks on Boundedness of Semilinear Oscillators -- The Dual Variational Method in Nonlocal Semilinear Tricomi Problems -- Symmetry Properties of Positive Solutions of Nonlinear Differential Equations Involving the p-Laplace Operator -- A Maximum Principle with Applications to the Forced Sine-Gordon Equation -- Lipschitzian Regularity Conditions for the Minimizing Trajectories of Optimal Control Problems -- Abstract Concentration Compactness and Elliptic Equations on Unbounded Domains

1. Mathematics
2. Functional analysis
3. Differential equations
4. Partial differential equations
5. Mathematics
6. Ordinary Differential Equations
7. Functional Analysis
8. Partial Differential Equations