Results 81 to 90 of about 21,534 (315)

New Subclasses of Bi-Univalent Functions Associated with Exponential Functions and Fibonacci Numbers

مجلة بغداد للعلوم
Lewin discussed the class  of bi-univalent functions and obtained the bound for the second coefficient, Sakar and Wanas defined two new subclasses of bi-univalent functions and obtained upper bounds for the elementary coefficients |a2| and |a3| for ...
Majd Ayash, Hassan Baddour, Mohammad Ali, Abbas Kareem Wanas   +3 more
doaj   +1 more source

Initial Coefficients of Biunivalent Functions

Abstract and Applied Analysis, 2014
An analytic function f defined on the open unit disk is biunivalent if the function f and its inverse f-1 are univalent in 𝔻. Estimates for the initial coefficients of biunivalent functions f are investigated when f and f-1, respectively, belong to some ...
See Keong Lee, V. Ravichandran, Shamani Supramaniam   +2 more
doaj   +1 more source

Matching univalent functions and conformal welding

, 2008
Given a conformal mapping $f$ of the unit disk $\mathbb D$ onto a simply connected domain $D$ in the complex plane bounded by a closed Jordan curve, we consider the problem of constructing a matching conformal mapping, i.e., the mapping of the exterior ...
Grong, Erlend, Gumenyuk, Pavel, Vasil'ev, Alexander   +2 more
core  

Ion and Solvent Dynamics in Charged 2D Clay Nanoslits with Unprecedented Ångström‐Precise Slit Height Control

Advanced Functional Materials, EarlyView.
The slit height of fluorohectorite 2D‐nanochannels is tuned with Å‐precision (2.4–250 Å). Slit‐height‐dependent ion and water mobilities are quantified by applying EIS, PFG‐NMR, and SFG‐NMR with MD simulations guiding interpretation. Diffuse properties are investigated with CP‐AFM, MD, and PB.
Max Stevenson, Sandra Pappler, Leonie Kanzler, Aqsa Nisar, Jepsinraj Kakkuzhiyulla Parambath, Markus Rosenstihl, Flora Lebeda, Sebastian Weiß, Georg Papastavrou, Michael Vogel, Jürgen Senker, Josef Breu   +11 more
wiley   +1 more source

Salagean-type harmonic univalent functions with fixed finitely many coefficients

Le Matematiche, 2015
In the present paper, authors introduce and study a new class of Salagean-type harmonic univalent functions that have fixed finitely many coefficients. We obtain coefficient conditions, extreme points, convolution condition, convex combinations for the ...
Saurabh Porwal, B. A. Frasin, Rekha Kureel   +2 more
doaj  

Applications of q-Bessel-Struve Functions on Univalent Functions

Mathematics
In this paper, the authors derived some new sufficient conditions for q-close-to-convexity with respect to certain functions involving three different normalizations of q-Bessel–Struve functions.
Saddaf Noreen, Saiful R. Mondal, Muhey U. Din, Saima Mushtaq, Zhang Wei, Adil Murtaza   +5 more
doaj   +1 more source

Tunable and Recyclable Piezoelectric Biomaterials via Ion‐Directed Guanine‐Quadruplex Assembly

Advanced Functional Materials, EarlyView.
Guanine‐quadruplex (GQ) assemblies, formed via ion‐mediated self‐assembly of amphiphilic guanine derivatives, are introduced as tunable and recyclable piezoelectric biomaterials. Distinct alkali ions induce unique dipole configurations and piezoelectric outputs, with K⁺ yielding the highest performance.
Seungho Lee, Sangyun Na, Yumi Cho, Gaeun Park, Seung Hak Oh, Jaejun Kim, Byoung‐Ki Cho, Sang Kyu Kwak, Ja‐Hyoung Ryu, Hyunhyub Ko   +9 more
wiley   +1 more source

Recombinant Proteins: A Molecular Tool to Understand Marine Adhesion and to Advance Biomaterials

Advanced Healthcare Materials, EarlyView.
The production of recombinant proteins represents a fundamental step in the characterisation of marine invertebrate adhesives and in the development of bio‐inspired glues. The association of these proteins with other components such as ions, proteins, polysaccharides, or polymers enables the fabrication of biomaterials for various healthcare ...
Alessandra Whaite, Emilie Duthoo, Mathilde Lefevre, Elise Hennebert, Patrick Flammang   +4 more
wiley   +1 more source

Asymptotic Conformality and Polygonal Approximation

Axioms
Univalent functions with asymptotically conformal extension to the boundary form a subclass of functions with quasiconformal extension with rather special features.
Samuel L. Krushkal
doaj   +1 more source

Coefficient problem for certain subclasses of bi-univalent functions defined by convolution [PDF]

Mathematica Moravica, 2016
In this paper, we consider a general subclass HλΣ (h, β) of bi-univalent functions. Bounds on the first two coefficients اa2ا and اa3ا for functions in HλΣ (h, β) are given. The main results generalize and improve a recent one obtained by Srivastava [18].
Altınkaya Sahsene, Yalçın Sibel
doaj