Results 111 to 120 of about 998 (123)

Bohr–Rogosinski Phenomenon for $$\mathcal {S}^*(\psi )$$ and $$\mathcal {C}(\psi )$$

Mediterranean Journal of Mathematics, 2021
In Geometric function theory, occasionally attempts have been made to solve a particular problem for the Ma-Minda classes, S∗(ψ) and C(ψ) of univalent starlike and convex functions, respectively. Recently, a popular radius problem generally known as Bohr’
Kamaljeet Gangania, S. S. Kumar
semanticscholar   +1 more source

New Classes of Non-normalized Meromorphically Multivalent Functions

Sarajevo Journal of Mathematics
Making use of certain differential operators, this paperintroduces two new classes: $${\mathcalM}_{m,n,\delta}^{\kappa}(q;p)\;\; \; \mbox{and} \;\;\;{\mathcalSK}_{m,n, \delta}^{\kappa}(q;p)$$ which consist of non-normalized meromorphically multivalent ...
Useyin Irmak
semanticscholar   +1 more source

Some operators of fractional calculus and their applications regarding various complex functions analytic in certain domains

Studia Universitatis Babeş-Bolyai. Mathematica
. In this academic research note, some familiar operators prearranged by fractional-order calculus will first be introduced and various characteristic properties of those operators will next be propounded.
Hüseyin Irmak
semanticscholar   +1 more source

Fractional Calculus Operator and Certain Applications in Geometric Function Theory

Sarajevo Journal of Mathematics
Using a operator involving fractional calculus introduced by Owa and Srivastava [8], two novel families: $${\mathcal V}_{\delta}^{\alpha, \beta}(\nu;\gamma)\;\; \mbox{and} \;\;{\mathcal W}_{\delta}^{\alpha, \beta}(\mu;\gamma)$$ $$(\delta\neq 0,\; \alpha
Useyin Irmak, N. Tuneski
semanticscholar   +1 more source

Generalized q-Srivastava-Attiya operator on multivalent functions

Studia Universitatis Babeş-Bolyai. Mathematica
In this article, we define a generalized q-integral operator on multivalent functions. It generalizes many known linear operators in Geometric Function Theory (GFT).
R. S. Badar, K. Noor
semanticscholar   +1 more source

Certain class of analytic functions defined by q-analogue of Ruscheweyh differential operator

Studia Universitatis Babeş-Bolyai. Mathematica
In this paper, we obtain coefficient estimates, distortion theorems, radii of close-to-convexity, starlikeness and convexity for functions belonging to the class of analytic starlike and convex functions defined by q−analogue of Ruscheweyh differential ...
M. Aouf, A. Moustafa, Fawziah Al-Quhali
semanticscholar   +1 more source

A Special Class of Harmonic Univalent Functions

Sarajevo Journal of Mathematics
We define and investigate a special class of Salagean-type harmonic univalent functions in the open unit disk. We obtain coefficient conditions, extreme points, distortion bounds, convex combinations for the above class of harmonic univalent functions.  
Tuğba Gencel, S. Yalçın
semanticscholar   +1 more source

Starlikeness and close-to-convexity involving certain differential inequalities

Studia Universitatis Babeş-Bolyai. Mathematica
In the present paper, we study certain differential inequalities involving meromorphic functions in the open unit disk and obtain certain sufficient conditions for starlikeness and close-to-convexity of meromorphic functions.
Kuldeep Kaur Shergill, S. S. Billing
semanticscholar   +1 more source

Hankel and symmetric Toeplitz determinants for Sakaguchi starlike functions

Studia Universitatis Babeş-Bolyai. Mathematica
. In this paper, we consider the class of starlike functions with respect to symmetric points which are also known as Sakaguchi starlike functions. We de- termine best possible bounds on Zalcman conjecture |a_n^2 – a_(2n-1) | and generalized Zalcman ...
Sushil Kumar, Swati Anand, Naveen Kumar Jain   +2 more
semanticscholar   +1 more source

Coefficient bounds for certain subclasses of bi-univalent functions

, 2016
Let Σ denotes the class of bi-univalent functions inD = {z ∈ C : |z| < 1}. In this paper, we consider two subclasses of Σ defined in the open unit disk D which are denoted by GΣ(α, β) and GΣ∗(α, β).
Andy Liew Pik Hern, A. Janteng
semanticscholar   +1 more source