Boundary value problems 1 Differential equations, Nonlinear 1 Dynamical systems and ergodic theory -- Dynamical systems with hyperbolic behavior -- Strange attractors, chaotic dynamics 1 Dynamical systems and ergodic theory -- Smooth dynamical systems: general theory -- Homoclinic and heteroclinic orbits 1 Groundwater flow 1 Hydrodynamics 1 Hydrologic cycle 1 Mathematical models 1 Nonlinear boundary value problems 1 Numerical solutions 1 Ordinary differential equations -- Asymptotic theory -- Asymptotic expansions 1 Ordinary differential equations -- Boundary value problems -- Nonlinear boundary value problems 1 Ordinary differential equations -- Boundary value problems -- Singular nonlinear boundary value problems 1 Ordinary differential equations -- Qualitative theory -- Complex behavior, chaotic systems 1 Ordinary differential equations -- Qualitative theory -- Homoclinic and heteroclinic solutions 1 Partial differential equations -- General topics -- Methods of ordinary differential equations 1 Partial differential equations -- Representations of solutions -- Traveling wave solutions 1 Soil infiltration rate 1 Soils 1 Solute movement 1