Results 51 to 60 of about 63,681 (326)
Quasi-convex univalent functions
International Journal of Mathematics and Mathematical Sciences, 1980 In this paper, a new class of normalized univalent functions is introduced. The properties of this class and its relationship with some other subclasses of univalent functions are studied. The functions in this class are close-to-convex.
K. Inayat Noor, D. K. Thomas
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, 2020 In this paper, we introduce a new class of analytic and bi-close-to-convex functions connected with q-convolution, which are defined in the open unit disk.
H. Srivastava, S. El-Deeb
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Janowski Type q-Convex and q-Close-to-Convex Functions Associated with q-Conic Domain
Mathematics, 2020 Certain new classes of q-convex and q-close to convex functions that involve the q-Janowski type functions have been defined by using the concepts of quantum (or q-) calculus as well as q-conic domain Ω k , q [ λ , α ]
M. Naeem +5 more
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COEFFICIENT BOUNDS FOR CERTAIN SUBCLASSES OF QUASI-CONVEX FUNCTIONS ASSOCIATED WITH CARLSON-SHAFFER OPERATOR [PDF]
Journal of Mechanics of Continua and Mathematical SciencesLet Υ denote the class of functions 𝜒(𝜉) of the form 𝜒(𝜉) = 𝜉 + ∑ 𝑎𝑛∞𝑛=2 𝜉𝑛 which are analytic in the open unit disc Δ = { 𝜉 ∈ ℂ: |𝜉| < 1 }. In recent times investigating the properties of several existing and new subclasses of quasi-convex functions ...
R. Sathish Srinivasan +3 more
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Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019 The aim of this paper is tointroduce a new subclasses of the Janowski type close-to-convex functionsdefined by Ruscheweyh derivative operator and obtain coefficient boundsbelonging to this class.
Öznur Özkan Kılıç
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On third Hankel determinants for subclasses of analytic functions and close-to-convex harmonic mappings [PDF]
Hacettepe Journal of Mathematics and Statistics, 2017 In this paper, we obtain the upper bounds to the third Hankel determinants for convex functions of order alfa and bounded turning functions of order alfa.
Yong Sun, Zhi-Gang Wang, A. Rasila
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Close‐to‐convexity of normalized Dini functions [PDF]
Mathematische Nachrichten, 2016 In this paper necessary and sufficient conditions are deduced for the close‐to‐convexity of some special combinations of Bessel functions of the first kind and their derivatives by using a result of Shah and Trimble about transcendental entire functions with univalent derivatives and some newly discovered Mittag–Leffler expansions for Bessel functions ...
Baricz, Árpád +2 more
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Mathematics, 2019 In this paper, our aim is to define a new subclass of close-to-convex functions in the open unit disk U that are related with the right half of the lemniscate of Bernoulli.
H. Srivastava +6 more
semanticscholar +1 more source
Coefficient Problems for Certain Close-to-Convex Functions
Bulletin of the Iranian Mathematical Society, 2023 In this paper, sharp bounds are established for the second Hankel determinant of logarithmic coefficients for normalised analytic functions satisfying certain differential inequality.
Mundalia, Mridula +1 more
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Close-to-convexity of quasihyperbolic and $j$-metric balls
, 2010 We will consider close-to-convexity of the metric balls defined by the quasihyperbolic metric and the $j$-metric. We will show that the $j$-metric balls with small radii are close-to-convex in general subdomains of $\Rn$ and the quasihyperbolic balls ...
Klén, Riku
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