Results 61 to 70 of about 590 (89)

An upper bound for third Hankel determinant of starlike functions related to shell-like curves connected with Fibonacci numbers

, 2018
We investigate the third Hankel determinant problem for some starlike functions in the open unit disc, that are related to shelllike curves and connected with Fibonacci numbers.
Janusz Sokół, S. Ilhan, H. Özlem Güney   +2 more
semanticscholar   +1 more source

Coefficient functionals for Sakaguchi-type-Starlike functions subordinated to the three-leaf function

Demonstratio Mathematica
A challenging part of studying geometric function theory is figuring out the sharp boundaries for coefficient-related problems that crop up in the Taylor-Maclaurin series of univalent functions.
Murugusundaramoorthy Gangadharan, Lupas Alina Alb, Alburaikan Alhanouf, El-Deeb Sheza M.   +3 more
doaj   +1 more source

On a subclass of analytic close-to-convex functions in q-analogue associated with Janowski functions

, 2018
In this article we define a new subclass of analytic multivalent close-to-convex functions in q -calculus associated with Janowski functions. We investigate some geometric properties such as sufficiency criteria, distortion problem, growth theorem, radii
B. Ahmad, M. Farooq, R. Khan
semanticscholar   +1 more source

Coefficient estimates and Fekete-Szegö problem for some classes of univalent functions generalized to a complex order

Demonstratio Mathematica
In this article, we determine coefficient estimates and study the Fekete-Szegö problem for classes Λn(b){\Lambda }_{n}\left(b) and Λnc(b){\Lambda }_{n}^{c}\left(b), where bb is a nonzero complex order.
Aron Mihai
doaj   +1 more source

Estimation of deviation angle for axial-flow compressor blade sections using inviscid-flow solutions [PDF]

Development of a method of estimating deviation angles by analytical procedures was begun. Solutions for inviscid, irrotational flow in the blade-to-blade plane were obtained with a finite-difference calculation method.
Miller, M. J.
core   +1 more source

Some properties of a class of holomorphic functions associated with tangent function

Demonstratio Mathematica
In this study, we define new class of holomorphic functions associated with tangent function. Furthermore, we examine the differential subordination implementation results related to Janowski and tangent functions. Also, we investigate some extreme point
Khan Muhammad Ghaffar, Mashwani Wali Khan, Salleh Zabidin, Tchier Fairouz, Khan Bilal, Malik Sarfraz Nawaz   +5 more
doaj   +1 more source

Coefficient bounds for q-convex functions related to q-Bernoulli numbers

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
The main objective of this paper is to present and investigate a subclass 𝒞(b, q) of q-convex functions in the unit disk that is defined by the q-Bernoulli numbers.
Breaz Daniel, Orhan Halit, Arıkan Hava, Cotˆırlă Luminiţa-Ioana   +3 more
doaj   +1 more source

Coefficient estimates for some classes of functions associated with \(q\)-function theory

, 2017
In this paper, for every $q\in(0,1)$, we obtain the Herglotz representation theorem and discuss the Bieberbach type problem for the class of $q$-convex functions of order $\alpha, 0\le ...
Agrawal, Sarita
core  

Estimating coefficients for certain subclasses of meromorphic and bi-univalent functions. [PDF]

J Inequal Appl, 2018
Sakar FM.
europepmc   +1 more source

Janowski type close-to-convex functions associated with conic regions. [PDF]

J Inequal Appl, 2017
Mahmood S, Arif M, Malik SN.
europepmc   +1 more source