Solitons Nonlinear waves 5 Evolution equations, Nonlinear 4 Wave-motion, Theory of 4 Chaotic behavior in systems 3 Nonlinear optics 3 Optical fibers 3 Spectral theory (Mathematics) 3 Asymptotic expansions 2 Differential equations, Partial 2 Fluid dynamics 2 Korteweg-de Vries equation 2 Mathematics 2 Nonlinear theories 2 Scattering (Mathematics) 2 Wave equation 2 Asymptotic theory 1 Bäcklund transformations 1 Darboux transformations 1 Differential equations, Nonlinear 1 Field theory (Physics) 1 Fractals 1 Geometry, Differential 1 Hamiltonian systems 1 History 1 Instantons 1 Inverse problems (Differential equations) 1 Inverse scattering transform 1 Quantum field theory 1 Solid state physics 1