Approximation of the identity

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

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