Results 21 to 30 of about 69 (69)

Calculating functional diversity metrics using neighbor‐joining trees

Ecography, Volume 2024, Issue 7, July 2024.
The study of functional diversity (FD) provides ways to understand phenomena as complex as community assembly or the dynamics of biodiversity change under multiple pressures. Different frameworks are used to quantify FD, either based on dissimilarity matrices (e.g. Rao entropy, functional dendrograms) or multidimensional spaces (e.g.
Pedro Cardoso, Thomas Guillerme, Stefano Mammola, Thomas J. Matthews, Francois Rigal, Caio Graco‐Roza, Gunilla Stahls, Jose Carlos Carvalho   +7 more
wiley   +1 more source

Starlikeness of sections of univalent functions [PDF]

Rocky Mountain Journal of Mathematics, 2014
Let ${\S}$ be the class of all normalized analytic and univalent functions in the unit disk $\ID$. In this paper, we determine condition so that each section $s_{n}(f,z)$ of $f\in {\S}$ is starlike in the disk $|z|\lt r_n$. In particular, $s_{n}(f,z)$ is starlike in $|z|\leq 1/2$ for $n \geq 47$.
Obradović, M., Ponnusamy, S.
openaire   +3 more sources

Compact convex sets free of inner points in infinite‐dimensional topological vector spaces

Mathematische Nachrichten, Volume 297, Issue 5, Page 1668-1677, May 2024.
Abstract An inner point of a non‐singleton convex set M$M$ is a point x∈M$x\in M$ satisfying that for all m∈M∖{x}$m\in M\setminus \lbrace x\rbrace$ there exists n∈M∖{m,x}$n\in M\setminus \lbrace m,x\rbrace$ such that x∈(m,n)$x\in (m,n)$. We prove the existence of convex compact subsets free of inner points in the infinite‐dimensional setting. Following
Almudena Campos‐Jiménez, Francisco Javier García‐Pacheco   +1 more
wiley   +1 more source

Ice age land bridges to continental islands: Repeated migration of the forest‐dwelling sable in northeastern Asia

Journal of Biogeography, Volume 51, Issue 5, Page 924-939, May 2024.
Abstract Aim The continental island system comprising Sakhalin, Hokkaido and the southern Kuril Islands (SHSK) in northeastern Asia serves as one of the southernmost habitats for many boreal and arctic organisms, with colonization via land bridges formed during glacial periods.
Gohta Kinoshita, Takuma Sato, Shota Murakami, Vladimir Monakhov, Alexey P. Kryukov, Lyubov V. Frisman, Yoshihiro Tsunamoto, Yoshihisa Suyama, Takahiro Murakami, Hitoshi Suzuki, Jun J. Sato   +10 more
wiley   +1 more source

The Loewner–Kufarev energy and foliations by Weil–Petersson quasicircles

Proceedings of the London Mathematical Society, Volume 128, Issue 2, February 2024.
Abstract We study foliations by chord–arc Jordan curves of the twice punctured Riemann sphere C∖{0}$\mathbb {C} \setminus \lbrace 0\rbrace$ using the Loewner–Kufarev equation. We associate to such a foliation a function on the plane that describes the “local winding” along each leaf. Our main theorem is that this function has finite Dirichlet energy if
Fredrik Viklund, Yilin Wang
wiley   +1 more source

Hankel Determinants for the Logarithmic Coefficients of a Subclass of Close‐to‐Star Functions

Journal of Mathematics, Volume 2024, Issue 1, 2024.
Suppose that ST1 is a class of close‐to‐star functions. In this paper, we investigated the estimate of Zalcman functional on the logarithmic coefficients and the third Hankel determinant for the class ST1 with the determinant entry of logarithmic coefficients.
Dong Guo, Huo Tang, Jun Zhang, Qingbing Xu, Zongtao Li, Predrag S. Stanimirović   +5 more
wiley   +1 more source

Macromolecular Poly(N‐isopropylacrylamide) (PNIPAM) in Cancer Treatment and Beyond

Advances in Polymer Technology, Volume 2024, Issue 1, 2024.
Poly(N‐isopropylacrylamide) (PNIPAM) is a versatile polymer known for its phase transition properties, exhibiting a lower critical solution temperature (LCST) of approximately 32°C. Below this temperature, PNIPAM is hydrophilic, while above it, the polymer becomes hydrophobic, making it ideal for thermosensitive drug delivery systems (DDSs).
Siddhi Throat, Sankha Bhattacharya, Songwei Tan   +2 more
wiley   +1 more source

Inclusion Properties for Classes of p‐Valent Functions

Journal of Function Spaces, Volume 2024, Issue 1, 2024.
Making use of a differential operator, which is defined here by means of the Hadamard product, we introduce classes of p‐valent functions and investigate various important inclusion properties and characteristics for these classes. Also, a property preserving integrals is considered.
B. M. Munasser, A. O. Mostafa, T. Sultan, Nasser A. EI-Sherbeny, S. M. Madian, Nikhil Khanna   +5 more
wiley   +1 more source

Properties of a Linear Operator Involving Lambert Series and Rabotnov Function

International Journal of Mathematics and Mathematical Sciences, Volume 2024, Issue 1, 2024.
This work is an attempt to apply Lambert series in the theory of univalent functions. We first consider the Hadamard product of Rabotnov function and Lambert series with coefficients derived from the arithmetic function σ(n) to introduce a normalized linear operator JRα,βz.
Jamal Salah, Bao Q. Li
wiley   +1 more source

Inclusion and Neighborhood on a Multivalent q‐Symmetric Function with Poisson Distribution Operators

Journal of Mathematics, Volume 2024, Issue 1, 2024.
In this paper, by using Poisson distribution probability, some characteristics of analytic multivalent q‐symmetric starlike and q‐symmetric convex functions of order η are examined. Then, by utilizing the Poisson distribution and the concept of the q‐analogue Salagean integral operator, the p‐valent convergence polynomial was introduced. Furthermore, a
Ebrahim Amini, Shrideh Al-Omari, Dayalal Suthar, Ding-Xuan Zhou   +3 more
wiley   +1 more source