Mathematics (May 2023)

Starlikeness Associated with the Van Der Pol Numbers

  • Mohsan Raza,
  • Hari Mohan Srivastava,
  • Qin Xin,
  • Fairouz Tchier,
  • Sarfraz Nawaz Malik,
  • Muhammad Arif

DOI
https://doi.org/10.3390/math11102231
Journal volume & issue
Vol. 11, no. 10
p. 2231

Abstract

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In this paper, we define a subclass of starlike functions associated with the Van der Pol numbers. For this class, we derive structural formula, radius of starlikeness of order α, strong starlikeness, and some inclusion results. We also study radii problems for various classes of analytic functions. Furthermore, we investigate some coefficient-related problems which include the sharp initial coefficient bounds and sharp bounds on Hankel determinants of order two and three.

Keywords