Results 91 to 100 of about 2,065 (197)
Cofficient estimates for a general Subclass of bi-univalent functions
Boletim da Sociedade Paranaense de Matemática, 2022 In this paper, we introduce and investigate an interesting subclass ${\cal{S}}^{h,p}_{\Sigma}(A,B,C,\lambda)$ of bi-univalent functions in the open unit disk $\mathbb{U}$. Furthermore, we find estimates on the $|a_2|$ and $|a_3|$ coefficients for functions in this subclass. The coefficient bounds presented here generalize some recent works
openaire +3 more sources
The Fekete-Szegö problem for a general class of bi-univalent functions satisfying subordinate conditions [PDF]
Sahand Communications in Mathematical Analysis, 2017 In this work, we obtain the Fekete-Szegö inequalities for the class $P_{Sigma }left( lambda ,phi right) $ of bi-univalent functions. The results presented in this paper improve the recent work of Prema and Keerthi [11].
Şahsene Altınkaya, Sibel Yalҫın
doaj
Analytical Science Advances, Volume 7, Issue 1, June 2026.ABSTRACT The properties and aggregations of anionic surfactants change strongly in the presence of multivalent cations. Therefore, the knowledge of the binding of multivalent metal ions to the headgroups of anionic surfactants can be helpful for the applications of surfactants in various fields. This paper presents an analysis of the interactions of 14
Anna Jakubowska
wiley +1 more source
ChemSusChem, Volume 19, Issue 8, 28 April 2026.Herein we report a facile, green, and scalable synthetic alternative for the obtention of layered double perovskites (LDPs) via mechanosynthesis. This approach allows for the synthesis of phase‐pure LDPs in batches of up to 5 g within minutes. To our knowledge, this represents the largest scale and fastest synthesis of these materials reported to date.
Teresa Ixchel Escobedo‐Perez +2 more
wiley +1 more source
Coefficient Bounds for a General Subclass of Bi-Univalent Functions
Le Matematiche, 2016 In the present investigation, we introduce and investigate a new subclass of the function class Sigma of bi-univalent functions defined in the open unit disc. We find estimates on the coefficients vertical bar a(2)vertical bar and vertical bar a(3)vertical bar for functions in the function class S-Sigma (n, h, lambda).
Yalcin, SİBEL, ALTINKAYA, ŞAHSENE
openaire +2 more sources
Fibonacci Numbers Related to Some Subclasses of Bi‐Univalent Functions
International Journal of Mathematics and Mathematical SciencesThis research paper introduces the novel subclass of bi‐univalent functions that are connected to Fibonacci numbers. Our main contributions in this study involve establishing constraints on the absolute values of the second coefficient |a2| and the third coefficient |a3| for functions within this specific subclass. In addition, we provide solutions to
Ala Amourah +3 more
openaire +2 more sources
Coefficient Estimates for Subclasses of Bi-Univalent Functions
Journal of Al-Qadisiyah for Computer Science and Mathematics, 2018 In the present paper, we introduce two new subclasses of the class consisting of analytic and bi-univalent functions in the open unit disk . Also, we obtain the estimates on the Taylor-Maclurin coefficients and for functions in these subclasses. We obtain new special cases for our results.
Waggas Galib Atshan, Rajaa Ali Hiress
openaire +2 more sources
On a new subclass of bi-univalent functions
Journal of the Egyptian Mathematical Society, 2013 The authors use the Sălăgean derivative to define two classes of bi-univalent function. Furthermore, they obtain estimates of \(|a_2|\) and \(|a_3|\) for the functions \(f(z)=z+\sum_{i=2}^\infty a_i z^i\) in those classes.
Porwal, Saurabh, Darus, M.
openaire +1 more source
On some subclasses of m-fold symmetric bi-univalent functions
Communications Faculty Of Science University of Ankara Series A1Mathematics and Statistics, 2018 In this work, we introduce two new subclasses S_{{\Sigma}_{m}}({\alpha},{\lambda}) and S_{{\Sigma}_{m}}(\b{eta},{\lambda}) of {\Sigma}_{m} consisting of analytic and m-fold symmetric bi-univalent functions in the open unit disk U. Furthermore, for functions in each of the subclasses introduced in this paper, we obtain the coefficient bounds for |a_{m+1}
ALTINKAYA, Şahsene, YALÇIN, Sibel
openaire +4 more sources
Journal of Inequalities and Applications, 2019 In the current work, we delineate a comprehensive class of bi-univalent functions connected with a bounded boundary variation to get the estimates of the first two Taylor–Maclaurin coefficients.
Huo Tang +3 more
doaj +1 more source