Silvermann-Toeplitz theorem for double sequences and series and its application to Nörlund means in non-archimedean fields
Solving some problems of advanced analytical nature posed in the SIAM Review. II.
Some integrability theorems for multiple trigonometric series
Several new integrability theorems are proved for multiple cosine or sine series.
Summability of double sequences by weighted mean methods and Tauberian conditions for convergence in Pringsheim's sense.
Sur les conditions de convergence de certaines séries multiples