Operator theory 3 Hamiltonian systems 2 Interpolation 2 Linear operators 2 Mathematical physics 2 Algorithms 1 Approximation theory 1 Asymptotic theory 1 Banach spaces 1 Coding theory 1 Combinatorial group theory 1 Complex manifolds 1 Congresses 1 Control theory.1 1 Cryptography.1 1 Data encryption (Computer science) 1 Differentiable mappings 1 Differential equations, Linear 1 Differential equations, Nonlinear 1 Differential equations, Partial.0 1 Eigenvalues 1 Finite differences 1 Fourier analysis 1 Function spaces 1 Functions of complex variables 1 Functions of several complex variables 1 Geometry, Differential. 0 1 Hankel operators 1 Holomorphic mappings 1 Information theory 1