Results 91 to 100 of about 9,723 (251)

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

Some results on certain subclasses of analytic functions involving generalized hypergeometric functions and Hadamard product

International Journal of Mathematics and Mathematical Sciences, 1992
By using a certain linear operator defined by a Hadamard product or convolution, several interesting subclasses of analytic functions in the unit disc are introduced and some unifying relationships between them are established.
Khalida Inayat Noor
doaj   +1 more source

A Study of Some Families of Multivalent q-Starlike Functions Involving Higher-Order q-Derivatives

Mathematics, 2020
In the present investigation, by using certain higher-order q-derivatives, the authors introduce and investigate several new subclasses of the family of multivalent q-starlike functions in the open unit disk.
B. Khan, Zhi-Guo Liu, H. Srivastava, N. Khan, M. Darus, M. Tahir   +5 more
semanticscholar   +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

Coefficient estimates for some classes of p-valent functions

International Journal of Mathematics and Mathematical Sciences, 1988
Let Ap, where p is a positive integer, denote the class of functions f(z)=zp+∑n=p+1anzn which are analytic in U={z:|z|
M. K. Aouf
doaj   +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

On certain classes of close-to-convex functions

International Journal of Mathematics and Mathematical Sciences, 1993
A function f, analytic in the unit disk E and given by , f(z)=z+∑k=2∞anzk is said to be in the family Kn if and only if Dnf is close-to-convex, where Dnf=z(1−z)n+1∗f, n∈N0={0,1,2,…} and ∗ denotes the Hadamard product or convolution.
Khalida Inayat Noor
doaj   +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

Toeplitz Determinants for Inverse of Analytic Functions

Mathematics
Estimates bounds for Carathéodory functions in the complex domain are applied to demonstrate sharp limits for the inverse of analytic functions. Determining these values is considered a more difficult task compared to finding the values of analytic ...
Sarem H. Hadi, Yahea Hashem Saleem, Alina Alb Lupaş, Khalid M. K. Alshammari, Abdullah Alatawi   +4 more
doaj   +1 more source

On a local version of Jack’s lemma

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2019
The purpose of this paper is to provide a result which concerns with the boundary behavior of analytic functions. It may be a local version of the well known Jack’s lemma when we change the function normalization at the origin.
Nunokawa Mamoru, Sokół Janusz
doaj   +1 more source