Continuity of Superposition Operators on the Double Sequence Spaces L-p

Sağır Duyar B., Gungor N.

FILOMAT, cilt.29, sa.9, ss.2107-2118, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 9
  • Basım Tarihi: 2015
  • Doi Numarası: 10.2298/fil1509107s
  • Dergi Adı: FILOMAT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2107-2118
  • Anahtar Kelimeler: Superposition Operators, Continuity, Double Sequence Spaces, Pringsheim's convergent
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

In this paper, we define the superposition operator P-g where g : N-2 x R -> R by P-g ((x(ks))) = 1 (k, s, x(ks)) for all real double sequence (x(ks)). Chew & Lee [4] and Petranuarat & Kemprasit [7] have characterized P-g : l(p) -> l(1) and P-g : l(p) -> l(q) where 1 <= p, q < infinity, respectively. The main goal of this paper is to construct the necessary and sufficient conditions for the continuity of P-g : L-p -> L-1 and P-g : L-p -> L-q where 1 <= p, q < infinity.