A preserving property of a Bernardi type operator.
Displaying 81 – 100 of 1149
A preserving property of generalized Libera integral operator.
Acu, Mugur (2004)
General Mathematics
A preserving property of the Alexander operator.
Acu, Mugur, Blezu, Dorin (2004)
Acta Universitatis Apulensis. Mathematics - Informatics
A preserving property of the generalized Bernardi integral operator.
Acu, Mugur (2004)
General Mathematics
A proof of the Livingston conjecture for the fourth and the fifth coefficient of concave univalent functions
Karl-Joachim Wirths (2004)
Annales Polonici Mathematici
Let D denote the open unit disc and f:D → ℂ̅ be meromorphic and injective in D. We further assume that f has a simple pole at the point p ∈ (0,1) and an expansion , |z| < p. In particular, we consider f that map D onto a domain whose complement with respect to ℂ̅ is convex. Because of the shape of f(D) these functions will be called concave univalent functions with pole p and the family of these functions is denoted by Co(p). It is proved that for p ∈ (0,1) the domain of variability of the coefficient...
A property of the class of functions whose derivative has a positive real part.
Obradović, Milutin (1989)
Publications de l'Institut Mathématique. Nouvelle Série
A remark on certain analytic class by using Ruscheweyh derivatives.
Aouf, M.K., Darwish, H.E., Attiya, A.A. (2000)
Mathematica Pannonica
A remark on certain close-to-convex functions
S. Owa, L. Liu, Wancang Ma (1989)
Matematički Vesnik
A remark on certain -valent functions.
Aouf, M.K., Darwish, H.E. (1996)
International Journal of Mathematics and Mathematical Sciences
A remark on the Hadamard products of -starlike functions.
Holoş, Amelia Anca, Holhoş, Viorel Cosmin (2004)
General Mathematics
A sharp bound for the Schwarzian derivative of concave functions
Bappaditya Bhowmik, Karl-Joachim Wirths (2012)
Colloquium Mathematicae
We derive a sharp bound for the modulus of the Schwarzian derivative of concave univalent functions with opening angle at infinity less than or equal to πα, α ∈ [1,2].
A study on starlike and convex properties for hypergeometric functions.
Mostafa, A.O. (2009)
JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]
A study on the generalization of Janowski functions in the unit disc.
Polatoglu, Y., Bolcal, M., Sen, A., Yavuz, E. (2006)
Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
A subclass of analytic functions defined by differential Sălăgean operator.
Alb Lupaş, Alina (2009)
Acta Universitatis Apulensis. Mathematics - Informatics
A subclass of analytic functions defined by Ruscheweyh derivative.
Alb Lupaş, Alina (2009)
Acta Universitatis Apulensis. Mathematics - Informatics
A Subclass Of Close-To-Convex Functions
H. R. Abdel-Gawad, D. K. Thomas (1991)
Publications de l'Institut Mathématique
A subclass of harmonic functions with varying arguments defined by Dziok-Srivastava operator
G. Murugusundaramoorthy, Kaliappan Vijaya, Ravinder Krishna Raina (2009)
Archivum Mathematicum
Making use of the Dziok-Srivastava operator, we introduce a new class of complex valued harmonic functions which are orientation preserving and univalent in the open unit disc and are related to uniformly convex functions. We investigate the coefficient bounds, distortion inequalities and extreme points for this generalized class of functions.
A subclass of --starlike functions.
Aouf, M.K., Shamandy, A., Mostafa, A.O., Madian, S.M. (2010)
Acta Universitatis Apulensis. Mathematics - Informatics
A subclass of uniformly convex functions associated with a fractional calculus operator involving Caputo's fractional differentiation.
Salah, Jamal, Darus, Maslina (2010)
Acta Universitatis Apulensis. Mathematics - Informatics
A subclass of uniformly convex functions associated with certain fractional calculus operators.
Murugusundaramoorthy, G., Rosy, Thomas, Darus, Maslina (2005)
JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]