Approximating the modulus of an inner function

Approximating with Gaussians

Approximation by analytic matrix functions. The four block problem

Approximation by polynomials in a weighted space of infinitely differentiable functions

Approximation by power series with $\pm 1$ coefficients

Approximation by Semigroups of Spherical Operators

Approximation in C^N

Approximation of classes of analytic functions by de la Vallee Poussin sums in uniform metric

Approximation of fractional integrals by means of derivatives

Approximation of functions from Lp(w)b by matrix means of their Fourier series

Approximation of functions of two variables by certain linear positive operators

Approximation of Holder continuous homeomorphisms by piecewise affine homeomorphisms

Approximation of smooth functions on compact two-point homogeneous spaces

Approximation orders of shift-invariant subspaces of $W^s_2({\Bbb R}^d)$

Approximation schemes satisfying Shapiro's Theorem

Approximation using scattered shifts of a multivariate function

Approximations of Set-Valued Functions by Metric Linear Operators

Approximations to -, di- and tri- logarithms

Area Littlewood-Paley functions associated with Hermite and Laguerre operators

Arguments of zeros of highly log concave polynomials