New extension of Alexander and Libera integral operators

New extension of Alexander and Libera integral operators

Let T be the class of analytic functions in the open unit disc U with f(0) = 0 and f ′ (0) = 1. For f(z) ∈ T, the Alexander integral operator $A_{−1}$f(z), the Libera integral operator $L_{−1}$f(z) and the Bernardi integral operator $B_{−1}$f(z) were considered before. Using $A_{−1}$f(z) and $L_{−1}$1f(z), a new integral operator Fλf(z) is considered. After discuss some properties of dominant for Fλf(z), another new integral operator $O_{−1}$f(z) of f(z) ∈ T is discussed. The object of the present paper is to discuss the dominant of new integral operators Fλf(z) and $O_{−1}$f(z) concerning with some starlike functions and convex functions in U.

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  • [1] Alexander JW. Functions which map the interior of the unit circle upon simple regions. Annals of Mathematics, Second Series 1915 ;17: 12-22.
  • [2] Bernardi SD. Convex and starlike univalent functions. Transactions of the American Mathematical Society 1969; 135: 429-446.
  • [3] Jack IS. Functions starlike and convex of order α. Journal of the London Mathematical Society 1971; 3: 469-474.
  • [4] Libera RJ. Some classes of regular univalent functions. Proceedings of the American Mathematical Society 1965; 16: 755-758.
  • [5] Miller SS, Mocanu PT. Second order differential inequalities in the complex plane. Journal of Mathematical Analysis and Applications 1978; 65: 289-305.
  • [6] Miller SS, Mocanu PT. Differential Subordinations, Theory and Applications. New York: NY, USA:Marcel Dekker Inc., 2000.
  • [7] Owa S, Güney HÖ. New Applications of the Bernardi Integral Operator. Mathematics 2020; 8: 1-12.
  • [8] Robertson MS. On the theory of univalent functions. Annals of Mathematics 1936; 37: 374-408.