Results 111 to 120 of about 9,723 (251)
Upper Bound of the Third Hankel Determinant for a Subclass of q-Starlike Functions
Symmetry, 2019 The main purpose of this article is to find the upper bound of the third Hankel determinant for a family of q-starlike functions which are associated with the Ruscheweyh-type q-derivative operator.
Shahid Mahmood +5 more
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The Bound of the Hankel Determinant of the Third Kind for Starlike Functions
Bulletin of the Malaysian Mathematical Sciences Society, 2018 In the present paper, the estimate of the third Hankel determinant $$\begin{aligned} \begin{aligned} H_{3,1}(f)&= \begin{vmatrix} a_{1}&a_{2}&a_{3} \\ a_{2}&a_{3}&a_{4} \\ a_{3}&a_{4}&a_{5} \end{vmatrix} \end{aligned} \end{aligned}$$H3,1(f ...
O. S. Kwon, A. Lecko, Y. J. Sim
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Journal of Function Spaces, 2018 This article deals with q-starlike functions associated with conic domains, defined by Janowski functions. It generalizes the recent study of q-starlike functions while associating it with the conic domains.
Shahid Mahmood +5 more
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On the hadamard products of Schlicht functions and applications
International Journal of Mathematics and Mathematical Sciences, 1985 We show that each of the schlicht classes of starlike, convex, close-to-convex and strongly starlike with respect to symmetric points is invariant under the Hadamard product with the class of convex functions.
H. S. Al-Amiri
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About a condition for starlikeness
Journal of Mathematical Analysis and Applications, 2007 AbstractA condition for starlikeness will be improved given by the inequality Re(f′(x)+αzf″(z))>0, z∈U, concerning analytic functions of the form f(z)=z+a2z2+⋯ which are defined on the unit disk U={z∈C:|z|
László-Róbert Albert, Róbert Szász
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Some Evaluations About Coefficients Boundaries for Specific Classes of Bi-Univalent Functions
AxiomsNew subclasses of bi-univalent functions with bounded boundary rotation are presented in this study. We acquired estimates for the initial coefficients a2, a3 and a4.
Suliman M. Sowileh +5 more
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Some general families of q-starlike functions associated with the Janowski functions
Filomat, 2019 By making use of the concept of basic (or q-) calculus, various families of q-extensions of starlike functions, which are associated with the Janowski functions in the open unit disk U, were introduced and studied from many different viewpoints and ...
H. Srivastava +4 more
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Sharp coefficient bounds for starlike functions associated with the Bell numbers
Mathematica Slovaca, 2019 Let SB∗ $\begin{array}{} \mathcal{S}^*_B \end{array}$ be the class of normalized starlike functions associated with a function related to the Bell numbers.
Virendra Kumar +3 more
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Extremal Problems in the Class of Starlike Functions [PDF]
, 1960 J. A. Hummel
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