A positivity result and normalization of positive convolution structures.
Michael Voit (1993)
Mathematische Annalen
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Michael Voit (1993)
Mathematische Annalen
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Dietmar Vogt, Reinhold Meise (1987/88)
Mathematische Annalen
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Grigore S. Sălăgean, Adela Venter (2017)
Mathematica Bohemica
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Making use of a modified Hadamard product, or convolution, of analytic functions with negative coefficients, combined with an integral operator, we study when a given analytic function is in a given class. Following an idea of U. Bednarz and J. Sokół, we define the order of convolution consistence of three classes of functions and determine a given analytic function for certain classes of analytic functions with negative coefficients.
Róbert Szász (2008)
Annales Polonici Mathematici
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The method of convolution is used to determine a sharp condition for starlikeness of analytic functions defined in the unit disc U = {z ∈ ℂ: |z| < 1} and having the property f(0) = f'(0) - 1 = 0. The integral version is given using the Alexander integral operator.
V. Anbuchelvi, S. Radha (1991)
Annales Polonici Mathematici
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H. Silvermann, E.M. Silvia, D. Telage (1978)
Mathematische Zeitschrift
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S. Owa (1986)
Matematički Vesnik
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E. A. Oyekan, T. O. Opoola (2014)
Annales Universitatis Mariae Curie-Sklodowska, sectio A – Mathematica
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In this paper we discuss some subordination results for a subclass of functions analytic in the unit disk U.
O. Ahuja, G. Murugusundaramoorthy, S. Sivasubramanian (2008)
Annales UMCS, Mathematica
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In the present paper, we apply methods based on differential subordinations and superordinations in order to derive several subordination results for multivalent functions involving the Hadamard product.
S. R. Yadava (1972)
Matematički Vesnik
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Alexander L. Koldobskii (1991)
Mathematische Annalen
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Hansmartin Zeuner (1989)
Mathematische Annalen
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Liu, Jin--Lin (2009)
General Mathematics
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Brian Fisher, Emin Özcag (1991)
Publications de l'Institut Mathématique
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