Konu "Hankel determinant" için listeleme
Toplam kayıt 11, listelenen: 1-11
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An application of (p, q)-calculus in harmonic univalent functions
(Işık University Press, 2020)The main aim of this paper is to define a (p, q)-multiplier transformation for harmonic functions. Using that we obtain coefficient inequality, extreme points, distortion theorem and covering results for the new subclass ... -
Convolutions of a subclass of harmonic univalent mappings
(Işık University Press, 2020)The main object of this paper is to investigate the convolution of a subclass of harmonic univalent mappings which is denoted by fa and generalized harmonic univalent mapping which is denoted by Pc. We obtained Pc ∗ fa is ... -
Generalized Hankel determinant for a general subclass of univalent functions
(Işık University Press, 2018)Making use of the generalized Hankel determinant, in this work, we consider a general subclass of univalent functions. Moreover, upper bounds are obtained for |a3 ? µa2 2|, where µ ? R. -
Neighbourhoods of a certain subclass of strongly starlike functions
(Işık University Press, 2020)In this paper we introduce and study a new subclass of strongly starlike functions of order ? defined by convolution structure. We investigate neighbourhoods and coefficient bounds of this class. -
On a class of sakaguchi functions related to Bernoulli lemniscate and modified sigmoid function
(Işık University Press, 2020)The aim of this investigation is to provide further results on a class of Sakaguchi functions related to Bernoulli Lemniscate and modified sigmoid function for the class SL(s, t, Φm,n). Early few coefficient bounds of f(z) ... -
Second Hankel determinant problem for several classes of analytic functions related to shell-like curves connected with Fibonacci numbers
(Işık University Press, 2018-01-16)In this paper, we investigate upper bounds for the second Hankel determinant in several classes of analytic functions in the open unit disc, related to shell-like curves and connected with Fibonacci numbers. -
Starlike symmetrical functions
(Işık University Press, 2020)The objective of the present paper is to study subclass S ? ?? ?? (A, B) of analytic functions that is defined by using the class of Janowski functions combined with the (j, k)-symmetrical functions. This class generalizes ... -
Study of subclasses of starlike and convex functions
(Işık University Press, 2020)In this article, we introduce new subclasses of starlike and convex functions by using a new differential operator defined in the open unit disk U. We study the geometric properties of such subclasses of starlike and convex ... -
Subclasses of multivalent functions of complex order associated with sigmoid function and bernoulli lemniscate
(Işık University Press, 2020)In this present work, subclasses of multivalent functions of complex order associated with simple logistic sigmoid activation function and Bernoulli Lemniscate were investigated. Early few coefficient bounds, relevant ... -
Third kind Hankel determinant for multivalent bounded turning functions of order alpha
(Işık University Press, 2021)The objective of this paper is to obtain an upper bound of the third order Hankel determinant for the class of multivalent bounded turning functions of order ? (0 ? ? < 1). -
Upper bound for third Hankel determinant of a class of analytic functions
(Işık University Press, 2023-10)We establish upper bounds for second Hankel determinant, the Fekete-Szegö functional and third Hankel determinant for normalized analytic functions f ? W?(?, ?),W?(?, ?) = { f : Re ((1 ? ? + 2?)f(z)/z+ (? ? 2?)f?(z) + ...