A TAUBERIAN THEOREM FOR (C, 1, 1) SUMMABLE DOUBLE SEQUENCES OF FUZZY NUMBERS


ÇANAK İ. , Totur U., ONDER Z.

IRANIAN JOURNAL OF FUZZY SYSTEMS, cilt.14, ss.61-75, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 14 Konu: 1
  • Basım Tarihi: 2017
  • Dergi Adı: IRANIAN JOURNAL OF FUZZY SYSTEMS
  • Sayfa Sayıları: ss.61-75

Özet

In this paper, we determine necessary and su ffi cient Tauberian conditions under which convergence in Pringsheim's sense of a double sequence of fuzzy numbers follows from its ( C, 1, 1) summability. These conditions are satis fi ed if the double sequence of fuzzy numbers is slowly oscillating in di ff erent senses. We also construct some interesting double sequences of fuzzy numbers.