Results 61 to 70 of about 7,251 (222)

Subordination Properties of Bi‐Univalent Functions Involving Horadam Polynomials

open access: yesJournal of Function Spaces, Volume 2025, Issue 1, 2025.
In this research, we investigate a family of q‐extensions defined on an open unit disk, which is based on bi‐univalent functions associated with differential subordination. Next, we define certain classes of bi‐univalent functions using generalized Horadam polynomials.
Ebrahim Amini   +2 more
wiley   +1 more source

On the Determinants for a Class of Analytic Function Using Sigmoid Beta‐Catas Operator

open access: yesJournal of Function Spaces, Volume 2025, Issue 1, 2025.
Geometric function theory (GFT) is the study of geometric properties of analytic functions. The cornerstone of GFT is the theory of univalent functions. Several related topics in GFT with various applications have been developed over the years, one of which includes the study of special functions.
Olubunmi A. Fadipe-Joseph   +4 more
wiley   +1 more source

Starlikeness associated with parabolic regions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
A parabolic starlike function f of order ρ in the unit disk is characterized by the fact that the quantity zf′(z)/f(z) lies in a given parabolic region in the right half-plane. Denote the class of such functions by PS∗(ρ).
Rosihan M. Ali
doaj   +1 more source

Hadamard Product on Subclasses of Meromorphic Functions Involving q‐Difference Operator

open access: yesJournal of Function Spaces, Volume 2025, Issue 1, 2025.
By making use of a q‐derivative operator, certain families of meromorphic q‐starlike functions and meromorphic q‐convex functions are introduced and studied. In this paper, we define a q‐analogous value of differential operators for meromorphic functions with the help of basic concepts of quantum (q‐)calculus operator theory and introduce new ...
W. Y. Kota   +3 more
wiley   +1 more source

Starlike functions of complex order involving q-hypergeometric functions with fixed point

open access: yesAnnales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, 2014
Recently Kanas and Ronning introduced the classes of starlike and convex functions, which are normalized with f(ksi)=f'(ksi)-1=0, ksi (|ksi|=d) is a fixed point in the open disc U ={z C:|z| 1}.
Kaliappan Vijaya   +2 more
doaj  

Characterization of p-valent q-starlike functions through Hadamard product and Poisson distribution

open access: yesApplied Mathematics in Science and Engineering
This paper presents significant advancement in the study of multivalent functions by introducing three new subclasses of p-valent q-starlike functions, defined with respect to higher-order q-derivatives within the open unit disk of the complex plane ...
Muhammad Uzair Shah   +3 more
doaj   +1 more source

Certain classes of starlike functions. [PDF]

open access: yesMichigan Mathematical Journal, 1985
The author introduces a one parameter family of starlike mappings in the unit disk by proving that if f(z) is analytic in \(| z| 0. \] The proof is based on an extended version of the author's lemma in Trans. Am. Math. Soc. 76, 254-274 (1954; Zbl 0057.311). Some applications are also given.
openaire   +2 more sources

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