Results 231 to 240 of about 10,536,036 (281)

The sharp bound of the third Hankel determinant for starlike functions

Forum mathematicum, 2022
In this paper, we prove the sharp inequality | H 3 , 1 ⁢ ( f ) | ≤ 4 / 9 \lvert H_{3,1}(f)\rvert\leq 4/9 for starlike functions 𝑓, where H 3 , 1 ⁢ ( f ) H_{3,1}(f) is the third Hankel determinant, thus solving a long-standing problem.
B. Kowalczyk, A. Lecko, D. K. Thomas
semanticscholar   +1 more source

On q-starlike functions

Bulletin des Sciences Mathématiques, 2023
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Krzysztof Piejko   +2 more
openaire   +2 more sources

A Conjecture on H3(1) for Certain Starlike Functions

Mathematica Slovaca, 2022
We prove a conjecture concerning the third Hankel determinant, proposed by Kumar and Kamaljeet in [A cardioid domain and starlike functions, Anal. Math. Phys. 11 (2021), Art.
Neha Verma, S. S. Kumar
semanticscholar   +1 more source

Starlike Functions Associated with Cosine Functions

Bulletin of the Iranian Mathematical Society, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Khadija Bano, Mohsan Raza
openaire   +2 more sources

Harmonic spirallike functions and harmonic strongly starlike functions

Monatshefte für Mathematik (Print), 2021
In this note, we define two subclasses of normalized harmonic univalent functions of the unit disk, spirallike functions and strongly starlike functions, which preserve a hereditary property and have nice analytic and geometric characterizations. We also
Xiuqi Ma, S. Ponnusamy, T. Sugawa
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy