Differential equations, Nonlinear Differential equations, Partial 16 Numerical solutions 15 Differential equations, Elliptic 11 Differential equations, Hyperbolic 9 Mathematical models 8 Chaotic behavior in systems 6 more ... Differentiable dynamical systems 6 Topological degree 6 Mathematical physics 5 Calculus of variations 4 Mathematical analysis 4 Mathematics 4 Monotone operators 4 Nonlinear boundary value problems 4 Nonlinear theories 4 Bifurcation theory 3 Congresses 3 Control theory 3 Harmonic analysis 3 Invariants 3 Variational inequalities (Mathematics) 3 Approximation theory 2 Asymptotic theory 2 Banach spaces 2 Boundary value problems 2 Cauchy problem 2 Computer algorithms 2 Continuum mechanics 2 Differential equations, Parabolic 2 less ...