Applications of the novel diamond alpha Hardy-Copson type dynamic inequalities to half linear difference equations


Kayar Z., Kaymakcalan B.

JOURNAL OF DIFFERENCE EQUATIONS AND APPLICATIONS, cilt.28, ss.457-484, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1080/10236198.2022.2042522
  • Dergi Adı: JOURNAL OF DIFFERENCE EQUATIONS AND APPLICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, MathSciNet, Metadex, zbMATH, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.457-484
  • Anahtar Kelimeler: Diamond alpha calculus, Hardy's inequality, Copson's inequality, TIME SCALES, THEOREM
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

This paper is devoted to novel diamond alpha Hardy-Copson type dynamic inequalities, which are zeta < 0 complements of the classical ones obtained fort zeta > 1, and their applications to difference equations. We obtain two kinds of diamond alpha Hardy-Copson type inequalities for zeta < 0, one of which is mixed type and established by the convex linear combinations of the related delta and nabla inequalities while the other one is new and is obtained by using time scale calculus rather than algebra. In contrast to the works existing in the literature, these complements are derived by preserving the directions of the classical inequalities. Therefore both kinds of our results unify some of the known delta and nabla Hardy-Copson type inequalities obtained for zeta < 0 into one diamond alpha Hardy-Copson type inequalities and offer new types of diamond alpha Hardy-Copson type inequalities which have the same directions as the classical ones and can be considered as complementary inequalities. Moreover the application of these inequalities in the oscillation theory of half linear difference equations provides several nonoscillation criteria for such equations.