Let {yk} be a sequence of functions, yk ε Πs ε S Es where S is a nonempty subset of the l-dimensional Euclidean space and Es is an ordered vector space with positive cone Ks. If yk ε Πs ε S Es, ...
Bulletin (Académie serbe des sciences et des arts. Classe des sciences mathématiques et naturelles. Sciences mathématiques), No. 45 (2020), pp. 25-41 (17 pages) We establish the characterisations of ...