Results 11 to 20 of about 75,857 (270)

On a coefficient problem for bi-univalent functions [PDF]

open access: yesProceedings of the American Mathematical Society, 1967
The function f(z) will be called bi-univalent if both f(z) and f-'(z) are univalent in I zI < 1; f(z) will be said to belong to oiff (i) f(z) CS and (ii) there exists a function g(z) ES such that f(g(z)) =g(f(z)) = z in some neighborhood of the origin. Z. Nehari remarked1 that if 4(Z) =4lz+02z2+ ...
M. Lewin
semanticscholar   +2 more sources

Coefficient estimates for certain subclass of bi-univalent functions [PDF]

open access: hybridAIP Conference Proceedings, 2017
In this paper, a subclass of bi-univalent functions is introduced using subordination. Estimates on the initial coefficients and the Fekete-Szego inequality are determined for functions in this subclass. The results would generalize the previous related works of several earlier authors.
Nurdiana Nurali   +2 more
openaire   +3 more sources

Study of quantum calculus for a new subclass of bi-univalent functions associated with the cardioid domain [PDF]

open access: yesHeliyon
In this article, we make use of the concepts of subordination and the q-calculus theory to analyze a new class of analytic bi-univalent functions associated to the cardioid domain.
Khaled Matarneh   +4 more
doaj   +2 more sources

Coefficient Estimates for New Subclasses of Meromorphic Bi-Univalent Functions. [PDF]

open access: yesInt Sch Res Notices, 2014
We introduce and investigate two new subclasses Mσα,λ and Mσβ,λ of meromorphic bi-univalent functions defined on Δ={z:z∈C,1<|z|<∞}. For functions belonging to these classes, estimates on the initial coefficients are obtained.
Bulut S.
europepmc   +6 more sources

Coefficient Estimates for Certain Classes of Bi-Univalent Functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2013
A function analytic in the open unit disk is said to be bi-univalent in if both the function and its inverse map are univalent there. The bi-univalency condition imposed on the functions analytic in makes the behavior of their coefficients ...
Jay M. Jahangiri, Samaneh G. Hamidi
doaj   +2 more sources

New subclasses of bi-univalent functions

open access: yesApplied Mathematics Letters, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Frasin, B.A., Aouf, M.K.
openaire   +4 more sources

An application of the Mittag-Leffler-type Borel distribution and Gegenbauer polynomials on a certain subclass of bi-univalent functions. [PDF]

open access: yesHeliyon
The Mittag-Leffler-type Borel distribution is widely recognized and utilized as a beneficial and pertinent model across numerous applications. This study presents a new subclass of normalized analytic bi-univalent functions that combines Gegenbauer ...
Hussen A.
europepmc   +2 more sources

The Miller-Ross Poisson distribution and its applications to certain classes of bi-univalent functions related to Horadam polynomials. [PDF]

open access: yesHeliyon
Within the scope of this research, we introduce a novel category of bi-univalent functions. Horadam polynomials are utilized to characterize these functions by utilizing series from the Poisson distribution of the Miller-Ross type.
Alnajar O   +4 more
europepmc   +2 more sources

Investigating New Inclusive Subclasses of Bi-Univalent Functions Linked to Gregory Numbers

open access: diamondWSEAS Transactions on Mathematics
In this article, we introduce three inclusive subclasses YΓ(κ, η, σ), WΓ(α, φ) and KΓ(α, φ) of the class of bi-univalent functions utilizing Gregory numbers.
T. Al-Hawary   +3 more
semanticscholar   +2 more sources

Sharp Bounds of the Fekete–Szegö Problem and Second Hankel Determinant for Certain Bi-Univalent Functions Defined by a Novel q-Differential Operator Associated with q-Limaçon Domain

open access: yesFractal and Fractional, 2023
In this present paper, we define a new operator in conjugation with the basic (or q-) calculus. We then make use of this newly defined operator and define a new class of analytic and bi-univalent functions associated with the q-derivative operator ...
Timilehin Gideon Shaba   +5 more
doaj   +2 more sources

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