On Some Spaces Isomorphic to the Space of Absolutely q-summable Double Sequences
KYUNGPOOK MATHEMATICAL JOURNAL, vol.58, no.2, pp.271-289, 2018 (ESCI, Scopus)
- Publication Type: Article / Article
- Volume: 58 Issue: 2
- Publication Date: 2018
- Doi Number: 10.5666/kmj.2018.58.2.271
- Journal Name: KYUNGPOOK MATHEMATICAL JOURNAL
- Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus
- Page Numbers: pp.271-289
- Istanbul University Affiliated: Yes
Abstract
Let 0 < q < infinity. In this study, we introduce the spaces BVq and LSq of q-bounded variation double sequences and q-summable double series as the domain of four-dimensional backward difference matrix Delta and summation matrix S in the space L-q of absolutely q-summable double sequences, respectively. Also, we determine their alpha- and beta-duals and give the characterizations of some classes of four-dimensional matrix transformations in the case 0 < q <= 1.