TANGENT APPROXIMATION BY SOLUTIONS OF THE CONVOLUTION EQUATION

RECOVERING THE LAPLACIAN FROM CENTERED MEANS ON BALLS AND SPHERES OF FIXED RADIUS

ON ONE ZALCMAN PROBLEM FOR THE MEAN VALUE OPERATOR

INTERPOLATION PROBLEMS FOR FUNCTIONS WITH ZERO BALL MEANS

Zero sets of solutions of the hyperbolic Darboux equation

On the problem of mean periodic extension

Vector fields with zero flux through spheres of fixed radius

The method of spherical harmonics for integral transforms on a sphere

A new characterization of holomorphic functions in the unit disk

Method of Riesz potentials applied to solution to nonhomogeneous singular wave equations