On some series of functions

Abstract

The study of the Fourier series convergence is a frequent subject in the speciality literature (see [3], [4]). It is known that the Fourier series convergence is very useful in the technical problems: the electromagnetic field and the loses in the case of an elliptic screen; the calculus of the rectangular plates, the simple leant beam actioned by a movable charge, the dynamic system of the metal bars in which the current crosses, the torsion of a rectangular bar, the quasi-stationary electromagnetic field, the motion of an elastic bar (see[1]). In this paper we will present some results concerning the Fourier series.