Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Luminit̨a-Ioana Cotîrlă"'
Publikováno v:
Symmetry, Vol 16, Iss 10, p 1303 (2024)
In this paper, we consider a subclass of normalized analytic functions associated with the hyperbolic secant function. We compute the sharp bounds on third- and fourth-order Hermitian–Toeplitz determinants for functions in this class. Moreover, we
Externí odkaz:
https://doaj.org/article/bd117132ba474b09bf09b5ae20146b21
Autor:
Qasim Ali Shakir, Adel Salim Tayyah, Daniel Breaz, Luminita-Ioana Cotîrlă, Eleonora Rapeanu, Fethiye Müge Sakar
Publikováno v:
Symmetry, Vol 16, Iss 10, p 1281 (2024)
This paper investigates the third Hankel determinant, denoted H3(1), for functions within the subclass RS∑*(λ) of bi-univalent functions associated with crescent-shaped regions φ⦅z=z+1+z2. The primary aim of this study is to establish upper bou
Externí odkaz:
https://doaj.org/article/62ddb76f3af448f48308500958ae29ed
Publikováno v:
Mathematics, Vol 12, Iss 11, p 1691 (2024)
In this paper, we create a new subclass of convex functions given with tangent functions applying the combination of Babalola operators and Binomial series. Moreover, we obtain several important geometric results, including sharp coefficient bounds,
Externí odkaz:
https://doaj.org/article/347dc2e0fe444839a55726fde44e8f63
Publikováno v:
Mathematics, Vol 12, Iss 10, p 1552 (2024)
In this paper, we discussed a new subclass JQ⅁,AB(q) of bi-univalent functions in the unit disk U using q-generalized Janowski function and q-derivative. Additionally, certain properties were examined and effectively demonstrated, such as the secon
Externí odkaz:
https://doaj.org/article/134316f5f30e490e9e2aa11316c60b04
Autor:
Sondekola Rudra Swamy, Daniel Breaz, Kala Venugopal, Mamatha Paduvalapattana Kempegowda, Luminita-Ioana Cotîrlă, Eleonora Rapeanu
Publikováno v:
Mathematics, Vol 12, Iss 9, p 1325 (2024)
We investigate some subclasses of regular and bi-univalent functions in the open unit disk that are associated with Lucas-Balancing polynomials in this work. For functions that belong to these subclasses, we obtain upper bounds on their initial coeff
Externí odkaz:
https://doaj.org/article/29e9fd6c383b4f1abf4adaee3d309d2f
Autor:
Hari M. Srivastava, Sheza M. El-Deeb, Daniel Breaz, Luminita-Ioana Cotîrlă, Grigore Stefan Sălăgean
Publikováno v:
Symmetry, Vol 16, Iss 2, p 226 (2024)
In this article, we first define and then propose to systematically study some new subclasses of the class of analytic and bi-concave functions in the open unit disk. For this purpose, we make use of a combination of the binomial series and the confl
Externí odkaz:
https://doaj.org/article/a11c7708ab4640f3a707c00ebdee2a01
Publikováno v:
Fractal and Fractional, Vol 7, Iss 12, p 883 (2023)
In this study, we begin by examining the τ-fractional differintegral operator and proceed to establish a novel subclass in the open unit disk E. The determination of the nth coefficient bound for functions within this recently established class is a
Externí odkaz:
https://doaj.org/article/86053790bd4c45ccae2edde8d2a00968
Publikováno v:
Mathematics, Vol 11, Iss 23, p 4834 (2023)
We utilize quasi-subordination to analyze and introduce several new classes, and we construct a new operator by combining the error function and q-convolution. Additionally, we obtain estimates for the Fekete Szego functional and the Taylor–Maclaur
Externí odkaz:
https://doaj.org/article/9196e4821dd54e669c226898eddecc14
Publikováno v:
Axioms, Vol 12, Iss 10, p 953 (2023)
We introduce and study a new pseudo-type κ-fold symmetric bi-univalent function class that meets certain subordination conditions in this article. For functions in the newly formed class, the initial coefficient bounds are obtained. For members in t
Externí odkaz:
https://doaj.org/article/bb6e92c6a23f43e9ba70ac585b443c2a
Publikováno v:
Symmetry, Vol 15, Iss 6, p 1133 (2023)
By using q-convolution, we determine the coefficient bounds for certain symmetric subclasses of analytic functions of complex order, which are introduced here by means of a certain non-homogeneous Cauchy–Euler-type differential equation of order m.
Externí odkaz:
https://doaj.org/article/0e7ea83533d04661b5b76c9b73b37399