The problem of reconstructing a piecewise constant function from a finite number of its Fourier coefficients perturbed by noise is considered. A reconstruction method, based on the computation of the ...

C. Bandle, A. Brillard, M. Flucher, Green's Function, Harmonic Transplantation, and Best Sobolev Constant in Spaces of Constant Curvature, Transactions of the ...

Fine structure constant may vary with space, constant in time Researchers extend direct fine structure measurements, confirm spatial variation.