Results 11 to 20 of about 10,536,036 (281)

On Janowski Starlike Functions [PDF]

Journal of Inequalities and Applications, 2008
For analytic functions f(z) in the open unit disc 𝕌 with f(0)=0 and f′(0)=1, applying the fractional calculus for f(z), a new fractional operator Dλf(z) is introduced.
S. Owa, E. Yavuz, A. Şen, Y. Polatog̃lu, M. Çag̃lar   +4 more
doaj   +6 more sources

Hankel and Toeplitz Determinants for q-Starlike Functions Involving a q-Analog Integral Operator and q-Exponential Function

Journal of Function Spaces
This article investigates the upper bounds of the second Hankel and Toeplitz determinants for a family of q-starlike functions defined by a q-analog integral operator, which is a more general form of the q-Srivastava-Attiya operator, and the q ...
Sarem H. Hadi, Maslina Darus, Rabha W. Ibrahim   +2 more
doaj   +2 more sources

Hankel and Toeplitz Determinants for a Subclass of q-Starlike Functions Associated with a General Conic Domain

Mathematics, 2019
By using a certain general conic domain as well as the quantum (or q-) calculus, here we define and investigate a new subclass of normalized analytic and starlike functions in the open unit disk U .
Hari M. Srivastava, Qazi Zahoor Ahmad, Nasir Khan, Nazar Khan, Bilal Khan   +4 more
doaj   +2 more sources

Quantitative Analysis of Polymers by MALDI-TOF Mass Spectrometry: Correlation Between Signal Intensity and Arm Number. [PDF]

J Mass Spectrom
ABSTRACT The signal intensities of linear and star‐shaped poly(L‐lactides) (PLA) and poly (ethylene oxides) (PEO) were compared to determine the influence of the number of arms on the ionization in matrix‐assisted laser desorption/ionization time‐of‐flight (MALDI‐TOF) mass spectrometry. In this study, a variety of blends were prepared and investigated,
Dalgic MS, Kumar S, Weidner SM.
europepmc   +2 more sources

SECOND HANKEL DETERMINANT FOR LOGARITHMIC INVERSE COEFFICIENTS OF CONVEX AND STARLIKE FUNCTIONS [PDF]

Bulletin of the Australian Mathematical Society, 2023
We obtain sharp bounds for the second Hankel determinant of logarithmic inverse coefficients for starlike and convex functions.
V. Allu, Amal Shaji
semanticscholar   +1 more source

Starlike Functions Based on Ruscheweyh q−Differential Operator defined in Janowski Domain

Fractal and Fractional, 2023
In this paper, we make use of the concept of q−calculus in the theory of univalent functions, to obtain the bounds for certain coefficient functional problems of Janowski type starlike functions and to find the Fekete–Szegö functional.
Luminiţa-Ioana Cotîrlǎ, G. Murugusundaramoorthy   +1 more
semanticscholar   +1 more source

Problems Concerning Coefficients of Symmetric Starlike Functions Connected with the Sigmoid Function

Symmetry, 2023
In numerous geometric and physical applications of complex analysis, estimating the sharp bounds of coefficient-related problems of univalent functions is very important due to the fact that these coefficients describe the core inherent properties of ...
M. I. Faisal, Isra Al-shbeil, Muhammad Abbas, Muhammad Arif, R. Alhefthi   +4 more
semanticscholar   +1 more source

Subclasses of p-Valent κ-Uniformly Convex and Starlike Functions Defined by the q-Derivative Operator

Mathematics, 2023
The potential for widespread applications of the geometric and mapping properties of functions of a complex variable has motivated this article. On the other hand, the basic or quantum (or q-) derivatives and the basic or quantum (or q-) integrals are ...
E. E. Ali, H. M. Srivastava, A. M. Albalahi   +2 more
semanticscholar   +1 more source

Sharp Coefficient Bounds for a New Subclass of q-Starlike Functions Associated with q-Analogue of the Hyperbolic Tangent Function

Symmetry, 2023
In this study, by making the use of q-analogous of the hyperbolic tangent function and a Sălăgean q-differential operator, a new class of q-starlike functions is introduced.
Chetan Swarup
semanticscholar   +1 more source

First-Order Differential Subordinations and Their Applications

Axioms, 2023
In this paper, we consider some relations related to the representations of starlike and convex functions, and obtain some sufficient conditions for starlike and convex functions by using the theory of differential subordination.
Ali Ebadian, Rasoul Aghalary, S. Shams, Nak Eun Cho, R. Alavi   +4 more
doaj   +1 more source