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Starlike functions associated with the generalized Koebe function




Julkaisun tekijät: Kargar Rahim, Trojnar-Spelina Lucyna

Kustantaja: SPRINGER BASEL AG

Julkaisuvuosi: 2021

Journal: Analysis and Mathematical Physics

Tietokannassa oleva lehden nimi: ANALYSIS AND MATHEMATICAL PHYSICS

Lehden akronyymi: ANAL MATH PHYS

Volyymi: 11

Julkaisunumero: 4

Sivujen määrä: 26

ISSN: 1664-2368

eISSN: 1664-235X

DOI: http://dx.doi.org/10.1007/s13324-021-00579-0

Verkko-osoite: https://link.springer.com/article/10.1007/s13324-021-00579-0

Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/66901288


Tiivistelmä
In this paper we study some properties of functions f which are analytic and normalized (i.e. f (0) = 0 = f' (0) - 1) such that satisfy the following subordination relation(zf'(z)/f(z) - 1) < z/ (1 - pz)(1 - qz),where (p, q) is an element of [-1, 1] x [-1, 1]. These types of functions are starlike related to the generalized Koebe function. Some of the features are: radius of starlikeness of order gamma is an element of [0, 1), image of f ({z : vertical bar z vertical bar < r}) where r is an element of (0, 1), radius of convexity, estimation of initial and logarithmic coefficients, and Fekete-Szego problem.

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Last updated on 2022-07-04 at 16:20