Results 91 to 100 of about 6,253 (237)

Estimates for the dilatation of $\sigma$-harmonic mappings

, 2014
We consider planar $\sigma$-harmonic mappings, that is mappings $U$ whose components $u^1$ and $u^2$ solve a divergence structure elliptic equation ${\rm div} (\sigma \nabla u^i)=0$, for $i=1,2$.
Alessandrini, Giovanni, Nesi, Vincenzo
core  

Mössbauer Spectroscopy on Antimony Borosulfates Reveals Weak Coordination Behavior

Angewandte Chemie International Edition, Volume 65, Issue 4, 22 January 2026.
The weakly coordinated trivalent antimony atoms show record‐breaking low chemical Mössbauer shifts, and in combination with several monovalent cations including silver, nitrosonium, thallium cations a rich crystal chemistry of closely related but different crystal structures. Sb(NH4)[B(SO4)2]4 showed a non‐linear SHG response comparable to that of KDP.
Erich Turgunbajew, Gwendolyn Buchner, Aylin Koldemir, Theresa Block, Rainer Pöttgen, David Hemker, Richard Dronskowski, Henning A. Höppe   +7 more
wiley   +1 more source

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

Mesoionic N‐Heterocyclic Olefins, Imines, Thiones, Phosphinidenes and Their Application in Catalysis

Angewandte Chemie International Edition, Volume 65, Issue 3, 16 January 2026.
This minireview covers recent advances in the synthesis, reactivity, and metal‐free catalytic uses of mesoionic N‐heterocyclic olefins (mNHOs), imines (mNHIs), thiones (mNHTs), and phosphinidenes (mNHPs). Abstract Transition metal compounds are widely known for their ability to activate small molecules and are excellent catalysts for a wide range of ...
Subir Maji, Sreejyothi P, Max M. Hansmann, Swadhin K. Mandal   +3 more
wiley   +1 more source

Bi-Univalent Functions Based on Binomial Series-Type Convolution Operator Related with Telephone Numbers [PDF]

, 2023
Hasan Bayram, K. Vijaya, G. Murugusundaramoorthy, Sibel Yalçın   +3 more
openalex   +1 more source

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
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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

Covalent Activation of the C‐type Lectin DC‐SIGN

Angewandte Chemie International Edition, Volume 65, Issue 3, 16 January 2026.
We introduce the first covalent activators of a C‐type lectin. Using orthogonal functional assays, NMR, MS/MS, and computational modeling, we delineate mechanisms from a functional electrophile‐first screen on dendritic cell‐specific intercellular adhesion molecule‐3‐grabbing non‐integrin (DC‐SIGN) that yields two modes: N‐hydroxysuccinimide (NHS ...
Jonathan Lefèbre, Maurice Besch, Noémi Csorba, Kristóf Garami, Zoltán Orgován, Gitta Schlosser, Iris Bermejo, Péter Ábrányi‐Balogh, György M. Keserű, Christoph Rademacher   +9 more
wiley   +1 more source

Fibonacci Numbers Related to Some Subclasses of Bi‐Univalent Functions

International Journal of Mathematics and Mathematical Sciences
This 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, Basem Aref Frasin, Jamal Salah, Tariq Al-Hawary   +3 more
openaire   +2 more sources

Coefficient estimates for a certain subclass of bi-univalent functions

Le Matematiche, 2016
Summary: In the present investigation, we find estimates on the coefficients \(|a_2|\) and \(|a_3|\) for functions in the function class \(S_\Sigma(\lambda,h)\). The results presented in this paper improve or generalize the recent work of \textit{N. Magesh} and \textit{J. Yamini} [Int. Math. Forum 8, No. 25--28, 1337--1344 (2013; Zbl 1283.30030)].
Yalcin, Sibel, Altınkaya, Şahsene
openaire   +2 more sources