let and be a sequence with non-negative entries. if , denote by the infimum of those satisfying the following inequality: whenever . the purpose of this paper is to give an upper bound for the norm of operator t on weighted sequence spaces d(w,p) and lp(w) and also e(w,?). we considered this problem for certain matrix operators such as norlund, weighted mean, ceasaro and copson matrices. th...

Let and be a sequence with non-negative entries. If , denote by the infimum of those satisfying the following inequality: whenever . The purpose of this paper is to give an upper bound for the norm of operator T on weighted sequence spaces d(w,p) and lp(w) and also e(w,?). We considered this problem for certain matrix operators such as Norlund, Weighted mean, Ceasaro and Copson ma...

Vaccination of children – summary and conclusions from a systematic review The full review can be found in Acta Pædiatrica 2010; 99: s461 Sven-Arne Silfverdal, Lennart Nilsson, Margareta Blennow, Rose-Marie Carlsson, Lars Å Hanson, Anders Lindberg, Lars Lindquist, Margaretha Magnusson, Anders Norlund, Olof Nyrén, Per Olcén, Patrick Olin, Juliette Säwe, Ann Söderström, Birger Trollfors, Åke Örtq...

Important and interesting results which are already known such as those by Pólya and Schoenberg in (1958), Başgöze et al. in (1970), and Ali in (1973), and which are related to convex maps of the unit disc are presented in this note by a more general, unified, and different method. The method considers the product of a nontrivial multiplier with the Norlund means, and shows how the known result...