Geometric properties of a new subclass of harmonic functions defined by q-differential inequality


Çakmak S.

Montes Taurus Journal of Pure and Applied Mathematics, cilt.7, sa.1, ss.146-156, 2025 (Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 7 Sayı: 1
  • Basım Tarihi: 2025
  • Dergi Adı: Montes Taurus Journal of Pure and Applied Mathematics
  • Derginin Tarandığı İndeksler: Scopus
  • Sayfa Sayıları: ss.146-156
  • Anahtar Kelimeler: coefficient bounds, distortion, q-calculus, q-close-to-convexity, q-harmonic functions
  • İstanbul Gelişim Üniversitesi Adresli: Evet

Özet

This paper introduces a novel subclass of q-harmonic functions in the open unit disk, defined via an inequality involving the q-derivative operator. The geometric properties of this class, particularly its close-to-convexity characteristics, are investigated. Main results include coefficient bounds, growth estimates, and a sufficient coefficient condition ensuring class membership. Additionally, the closure properties of this subclass under convolution and convex combination are examined, highlighting its structural stability. By incorporating q-calculus, this study extends existing results in harmonic function theory and provides new insights into the geometric behavior of these functions.