Matrix transformations of some sequence spaces over N on -A Rchimedi an fields
The Seifert - Van Kampen theorem for the group of global sections
On Holditch and Liouville theorems
On the inverse scattering problem for a discrete one-dimensional Schrödinger equation
On p - valent functions with negative and missing coefficients
A class of meromorphic univalent functions with positive and fixed finitely many coefficients