Results 41 to 50 of about 325 (120)
Applications laguerre polynomials for families of bi-univalent functions defined with (p,q)-wanas operator [PDF]
, 2023 In current manuscript, using Laguerre polynomials and (Formula presented.) -Wanas operator, we identify upper bounds (Formula presented.) and (Formula presented.) which are first two Taylor-Maclaurin coefficients for a specific bi-univalent functions ...
Wanas, Abbas Kareem +2 more
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Some Subclasses of Univalent and Bi-Univalent Functions Related to K-Fibonacci Numbers and Modified Sigmoid Function [PDF]
, 2023 يهتم هذا البحث بفئات فرعية معينة من الدوال احادية التكافؤ وثنائية التكافؤ فيما يتعلق بمنحنيات تشبه الصدفة المرتبطة بأرقام فيبوناتشي k تتضمن دالة التنشيط السيني المعدلة θ(t)=2/(1+e^(-t) ) ,t ≥0في قرص الوحدة|z|<1. تقديرات المعاملات الاولية |c_2 | , |c_3
Juma, Abdul Rahman S. +1 more
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Mathematics, 2023 The main goal of this investigation is to obtain sharp upper bounds for Fekete-Szegö functional and the third Hankel determinant for a certain subclass SL∗u,v,α of holomorphic functions defined by the Carlson-Shaffer operator in the unit disk.
Halit Orhan +2 more
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Fekete-Szego problem for a general subclass of analytic functions [PDF]
, 2019 WOS: 000488222100041In this present investigation, we introduced a certain subclass of starlike and convex functions of complex order b, using a linear multiplier differential operator D(lambda,mu)(m)f (z).
Uyanik, Neslihan
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Fekete-Szegö problems for generalized Sakaguchi type functions associated with quasi-subordination [PDF]
, 2018 In the present paper, the authors introduce a generalized Sakaguchi type non-Bazilevic function class Mλ,β (φ, s, t) of analytic functions involving quasi-subordination and obtain bounds for the Fekete-Szegö functional |a3 −µa2 for the functions ...
PANIGRAHI, Trailokya +1 more
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The Fekete-Szegö Problem for p-Valently Janowski Starlike and Convex Functions
International Journal of Mathematics and Mathematical Sciences, 2011 For p-valently Janowski starlike and convex functions defined by applying subordination for the generalized Janowski function, the sharp upper bounds of a functional |ap+2−μa2p+1| related to the Fekete-Szegö problem are given.
Toshio Hayami, Shigeyoshi Owa
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, 2020 Inequalities appear in various fields of natural science and engineering. Classical inequalities are still being improved and/or generalized by many researchers. That is, inequalities have been actively studied by mathematicians.
Furuichi, Shigeru
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Coefficient estimates for Ruscheweyh derivatives
International Journal of Mathematics and Mathematical Sciences, 2004 We consider functions f, analytic in the unit disc and of the normalized form f(z)=z+∑n=2∞anzn. For functions f∈R¯δ(β), the class of functions involving the Ruscheweyh derivatives operator, we give sharp upper bounds for the Fekete-Szegö functional |a3 ...
Maslina Darus, Ajab Akbarally
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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 +1 more
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Application of Gegenbauer polynomials for biunivalent functions defined by subordination [PDF]
, 2022 We present and investigate a new subclass of biunivalent functions by applying Gegenbouer polynomials in this paper. Also, we find nonsharp estimates on the first two coefficients vertical bar b(0)vertical bar and vertical bar b(1)vertical bar for ...
Ahmad, Ibrar +2 more
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