Results 11 to 20 of about 96 (94)

Strong subordination and superordination with sandwich-type theorems using integral operators

open access: yes, 2021
The notions of strong differential subordination and superordination have been studied recently by many authors. In the present paper, using these concepts, we obtain some preserving properties of certain nonlinear integral operator defined on the space ...
ARJOMANDINIA, Parviz, AGHALARY, Rasoul
core   +1 more source

Meromorphic close-to-convex functions satisfying a differential inequality

open access: yes, 2020
In the present paper, we study the differential inequality ... where f ∈ Σ and notice that the members of class Σ which satisfy the above inequality are meromorphic close-to-convex.
BILLING, Sukhwinder Singh   +1 more
core   +1 more source

The Relationships Between p−valent Functions and Univalent Functions

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2015
In this paper, we obtain some sufficient conditions for general p−valent integral operators to be the p−th power of a univalent functions in the open unit disk.
Çağlar Murat
doaj   +1 more source

Spatial decay estimates for a class of nonlinear damped hyperbolic equations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 27, Issue 1, Page 17-26, 2001., 2001
This paper is concerned with investigating the spatial decay estimates for a class of nonlinear damped hyperbolic equations. In addition, we compare the solutions of two‐dimensional wave equations with different damped coefficients and establish an explicit inequality which displays continuous dependence on this coefficient.
F. Tahamtani, K. Mosaleheh, K. Seddighi
wiley   +1 more source

On sandwich theorems for some subclasses defined by generalized hypergeometric functions

open access: yes, 2017
In this paper we derive some subordination and superordination results for certain normalized analytic functions in the open unit disc, which are acted upon by a class of generalized hypergeometric function Hq,s(α1).
EL-ASHWAH, Rabha Mohamed   +2 more
core   +1 more source

Certain sufficient conditions for phi-like functions in a parabolic region

open access: yes, 2023
To obtain the main result of the present paper we use the technique of differential subordination. As special cases of our main result, we obtain sufficient conditions for \(f\in A\) to be φ -like, starlike and close-to-convex in a parabolic region ...
Richa Brar   +5 more
core   +1 more source

On multivalent starlike functions

open access: yes, 2019
We prove some new sufficient conditions for function to be p-valent, or p-valently starlike in the unit disc.
SOKÓŁ, Janusz, NUNOKAWA, Mamoru
core   +1 more source

g-Loewner chains, Bloch functions and extension operators into the family of locally biholomorphic mappings in infinite dimensional spaces

open access: yes, 2022
In this paper, we survey recent results obtained by the authors on the preservations of the first elements of (g-) Loewner chains and the Bloch mappings by the Roper-Suffridge type extension operators, the Muir type extension opera- tors and the ...
HAMADA, Hidetaka   +3 more
core   +1 more source

Starlike Functions With Respect to a Boundary Point Connected With Bounded Radius Rotation

open access: yesJournal of Function Spaces, Volume 2026, Issue 1, 2026.
In the current article, we introduce a new subclass of univalent function Gμ with bounded radius rotation. For this new class, the authors establish many interesting relations between these classes and existing classes. Furthermore, authors try to find coefficient estimations for this new subclass.
Alhanouf Alburaikan   +5 more
wiley   +1 more source

On generalized close-to-convexity related with strongly Janowski functions

open access: yes, 2023
Janowski functions of strongly type are used to define certain classes of analytic functions which generalize the concept of close-to-convexity and bounded boundary rotation.
SHAH, Shujaat Ali, NOOR, Khalida Inayat
core   +1 more source

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