Results 61 to 70 of about 4,110 (218)
Fourth Hankel Determinant for a Subclass of Starlike Functions Based on Modified Sigmoid
Journal of Function Spaces, 2021 In our present investigation, we obtain the improved third-order Hankel determinant for a class of starlike functions connected with modified sigmoid functions.
Wali Khan Mashwani +6 more
doaj +1 more source
Estimasi Batas Atas Minimal Pada Modulus Koefisien Fungsi Starlike [PDF]
, 2013 Dalam fungsi univalen terdapat beberapa macam fungsi, yaitu fungsi basilevic, fungsi hadamard, fungsi konveks dan fungsi starlike. Pada skripsi ini dianalisis beberapa modulus koefisien fungsi starlike untuk memperoleh estimasi batas atas minimal ...
Ferima, CynthiaAlvionita
core
On the Marx conjecture for the convex hulls of families of starlike and convex mappings
, 1974 We prove a Marx conjecture for the closed convex hull of the family of functions which are starlike of order α \alpha and k-fold symmetric. We obtain precise results for the functions which are starlike, starlike of order
David J. Hallenbeck
core +1 more source
Coefficient Inequalities Related With Apple‐Like Functions
Journal of Function Spaces, Volume 2026, Issue 1, 2026.Several subfamilies of Ma and Minda starlike and convex functions have been examined differently through individual generating functions in the literature. However, little or no effort has been devoted to subfamily arising from the product of these generating functions.
Aiman Sana +3 more
wiley +1 more source
Some Remarks on Ozaki, Ono and Umezawa’s Results
MathematicsRecall that in On a general second order derivative, Sci. Rep. Tokyo Kyoiku Daigaku A, 5(124–127)(1956), 111–114, Ozaki, Ono and Umezawa proved a result that if f(z) is analytic and satisfies |f″(z)|
Mamoru Nunokawa +3 more
doaj +1 more source
Properties of a new integral operator
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2016 In this paper, we derive sufficient conditions for the univalence, star- likeness, convexity and some other properties in the class N (ρ) ; for a new integral operator defined on the space of normalized analytic functions in the open unit disk.
Bucur Roberta +2 more
doaj +1 more source
Journal of Function Spaces, Volume 2026, Issue 1, 2026.In geometric function theory and complex analysis, analytic functions exhibiting geometric symmetry play a fundamental role. However, investigations concerning multileaf domains, particularly those with fivefold rotational symmetry, have been relatively limited.
Suad Al-Mayyahi +4 more
wiley +1 more source
Unified Approach of the Logarithmic Coefficient Bounds for the Class of Bazilevic˘ Functions
Journal of Function Spaces, Volume 2026, Issue 1, 2026.The investigation of logarithmic coefficients in the theory of univalent functions began with Milin, who demonstrated their importance for understanding geometric features of these mappings through their connection with the Taylor coefficients hm. If S denotes the family of univalent functions on the unit disk D with the expansion hz=z+∑m=2∞hmzm, the ...
Ebrahim Analouei Adegani +3 more
wiley +1 more source
Sufficient Conditions for Janowski Starlikeness [PDF]
International Journal of Mathematics and Mathematical Sciences, 2007 LetA,B,D,E∈[−1,1]and letp(z)be an analytic function defined on the open unit disk,p(0)=1. Conditions onA,B,D, andEare determined so that1+βzp'(z)being subordinated to(1+Dz)/(1+Ez)implies thatp(z)is subordinated to(1+Az)/(1+Bz). Similar results are obtained by considering the expressions1+β(zp'(z)/p(z))and1+β(zp'(z)/p2(z)).
Rosihan M. Ali +2 more
openaire +4 more sources