Approximation, Order of approximation, Diophantine approximation, Approximation algorithm, Approximation theory, Linear approximation, Successive-approximation ADC, Stirling's approximation, Born approximation, Polynomial-time approximation scheme, Approximation in algebraic groups, Superstrong approximation, WKB approximation, Minimax approximation algorithm, Discrete dipole approximation, Dirichlet's approximation theorem, Born–Huang approximation, Two-stream approximation, Bhāskara I's sine approximation formula, Spouge's approximation, Paraxial approximation, Laplace's approximation, Journal of Approximation Theory, Boussinesq approximation, Cellular approximation theorem, Successive approximation, Supersymmetric WKB approximation, High-frequency approximation, Rational approximation, Percus–Yevick approximation, Artin approximation theorem, Simplicial approximation theorem, Weak approximation, Born–Oppenheimer approximation, Approximations of π, Rotating-wave approximation, Muffin-tin approximation, Komlós–Major–Tusnády approximation, Low-rank approximation, Approximation error, Small-angle approximation

Local-density approximation, Coherent potential approximation, Sheth–Tormen approximation, Slowly varying envelope approximation, Patched conic approximation, Approximation property (ring theory), Least-squares function approximation, Fully polynomial-time approximation scheme, Approximation to the identity, Stochastic approximation, Binomial approximation, Heavy traffic approximation, Function approximation, Constructive Approximation, Hardness of approximation, Rayleigh–Gans approximation, Typographic approximation, Low-rank matrix approximations, Sparse approximation, Simultaneous perturbation stochastic approximation, Eikonal approximation, Side-approximation theorem, Derjaguin approximation, McKay's approximation for the coefficient of variation, Approximation property, Parameterized approximation algorithm, Empty lattice approximation, Quenched approximation, Random phase approximation, East Journal on Approximations, APX, Korovkin approximation, Approximation-preserving reduction, Quasistatic approximation, GW approximation, Sigma approximation, Acoustic approximation, Effective medium approximations, Vecchia approximation, Lanczos approximation, Steady state (chemistry), Fitness approximation, Bernstein's theorem (approximation theory), CUR matrix approximation, Padé approximant, Stone–Weierstrass theorem, Kronecker's theorem, Kirkwood approximation, Beta plane, Universal approximation theorem

Approximation, Order of approximation, Diophantine approximation, Approximation algorithm, Approximation theory, Linear approximation, Successive-approximation ADC, Stirling's approximation, Born approximation, Polynomial-time approximation scheme, Approximation in algebraic groups, Superstrong approximation, WKB approximation, Minimax approximation algorithm, Discrete dipole approximation, Dirichlet's approximation theorem, Born–Huang approximation, Two-stream approximation, Bhāskara I's sine approximation formula, Spouge's approximation, Paraxial approximation, Laplace's approximation, Journal of Approximation Theory, Boussinesq approximation, Cellular approximation theorem, Successive approximation, Supersymmetric WKB approximation, High-frequency approximation, Rational approximation, Percus–Yevick approximation, Artin approximation theorem, Simplicial approximation theorem, Weak approximation, Born–Oppenheimer approximation, Approximations of π, Rotating-wave approximation, Muffin-tin approximation, Komlós–Major–Tusnády approximation, Low-rank approximation, Approximation error, Small-angle approximation, Local-density approximation, Coherent potential approximation, Sheth–Tormen approximation, Slowly varying envelope approximation, Patched conic approximation, Approximation property (ring theory), Least-squares function approximation, Fully polynomial-time approximation scheme, Approximation to the identity, Stochastic approximation, Binomial approximation, Heavy traffic approximation, Function approximation, Constructive Approximation, Hardness of approximation, Rayleigh–Gans approximation, Typographic approximation, Low-rank matrix approximations, Sparse approximation, Simultaneous perturbation stochastic approximation, Eikonal approximation, Side-approximation theorem, Derjaguin approximation, McKay's approximation for the coefficient of variation, Approximation property, Parameterized approximation algorithm, Empty lattice approximation, Quenched approximation, Random phase approximation, East Journal on Approximations, APX, Korovkin approximation, Approximation-preserving reduction, Quasistatic approximation, GW approximation, Sigma approximation, Acoustic approximation, Effective medium approximations, Vecchia approximation, Lanczos approximation, Steady state (chemistry), Fitness approximation, Bernstein's theorem (approximation theory), CUR matrix approximation, Padé approximant, Stone–Weierstrass theorem, Kronecker's theorem, Kirkwood approximation, Beta plane, Universal approximation theorem, Saddlepoint approximation method, Müntz–Szász theorem, Wien approximation, Boussinesq approximation (buoyancy), Independent electron approximation, Model solid approximation, Boussinesq approximation (water waves), Oka–Weil theorem, Adam Adamandy Kochański, Mergelyan's theorem, Quasi-harmonic approximation, Diffuse element method, K-minimum spanning tree, K-approximation of k-hitting set, Progressive-iterative approximation method, Weak temperature gradient approximation, Schlick's approximation, Stokes approximation and artificial time, Dynamical mean-field theory, Markov chain approximation method, Continuous slowing down approximation range, Central field approximation, Convex volume approximation, Binary collision approximation, Moment closure, Iterative method, Korringa–Kohn–Rostoker method, Geometric set cover problem, Taylor's theorem, Runge's theorem, Integrated nested Laplace approximations, Impact depth, Minimum-weight triangulation, Pi Day, Black's approximation, Gaussian process approximations, Mean-field theory, Nearly free electron model, Wiener connector, Simple rational approximation, Fresnel diffraction, Maximum cut, Gas in a box, Liouville number, Cauchy–Born rule, Bethe–Salpeter equation, Independent set (graph theory), Thin lens, Opaque set, Semiclassical, Adiabatic theorem, Fluid limit, Relaxation (approximation), Laser linewidth, Stationary phase approximation, Shaping (psychology), Post-Newtonian expansion, Partition problem, Simple continued fraction, Thin set (Serre)