Approximating fixed points of asymptotically nonexpansive mappings in Banach spaces by metric projections

Approximating orthogonal matrices by permutation matrices

Approximating Spectral invariants of Harper operators on graphs

Approximation by analytic operator functions. Factorizations and very badly approximable functions

Approximation by Lipschitz, analytic maps on certain Banach spaces

Approximation by Lipschitz, C^{p} smooth functions on weakly compactly generated Banach spaces

Approximation by q-Szasz operators

Approximation by smooth functions with no critical points on separable Banach spaces

Approximation of *weak-to-norm continuous mappings

Approximation of Besov vectors by Paley-Wiener vectors in Hilbert spaces

Approximation of chaotic operators

Approximation of continuous functions on Fréchet spaces

Approximation of dual Gabor frames, window decay, and wireless communications

Approximation of Fourier Integral Operators by Gabor multipliers

Approximation of functions and their derivatives by analytic maps on certain Banach spaces

Approximation of Lipschitz functions by $Δ$-convex functions in Banach spaces

Approximation of Lipschitz functions by Lipschitz, C^{p} smooth functions on weakly compactly generated Banach spaces

Approximation of operators in Banach spaces

Approximation of quantum Levy processes by quantum random walks

Approximation of Relaxed Dirichlet Problems by Boundary Value problems in perforated domains