Schauder decompositions and their applications to continuity of maps.
Singular supports. I.
Some inequalities involving upper bounds for some matrix operators. I
In this paper we consider the problem of finding upper bounds of certain matrix operators such as Hausdorff, Nörlund matrix, weighted mean and summability on sequence spaces and Lorentz sequence spaces , which was recently considered in [9] and [10] and similarly to [14] by Josip Pecaric, Ivan Peric and Rajko Roki. Also, this study is an extension of some works by G. Bennett on spaces, see [1] and [2].
Some observations on local uniform boundedness principles. II
Stability of the method of least squares for finding the eigenvalues of a symmetric operator
Summation operators and "explicit formulas"
Sur une classe d’applications linéaires continues des espaces