Srikandan Sivasubramanian
Research Subjects
Srikandan Sivasubramanian has a total of 62 co-authors. Here are the top co-authors by number of shared publications:
- Gangadharan Murugusundaramoorthy
Department of Mathematics, School of Advanced sciences, Vellore Institute of Technology, Vellore, India
6 shared publications - Sheza. M. El-Deeb
Department of Mathematics, College of Science, Qassim University, Buraydah 51452, Saudi Arabia
6 shared publications - Prathviraj Sharma
Department of Mathematics, University College of Engineering Tindivanam, Anna University, Tindivanam 604001, Tamilnadu, India
5 shared publications - Nak Eun Cho
Department of Applied Mathematics, Pukyong National University, Busan, South Korea
4 shared publications - Adam Lecko
Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
3 shared publications - Daniel Breaz
Department of Mathematics, “1 Decembrie 1918” University of Alba Iulia, 510009 Alba Iulia, Romania
3 shared publications
Latest Publications
- 15 October 2026
- Published by Universitatea din Oradea in Analele Universității din Oradea, fascicola Matematica
- Vol. 33 (2) , 271-290
Hankel determinants of certain subclasses of bi-univalent functions associated with hyperbolic sine function
In this article, we discuss the concepts of bi-starlike and bi-convex functions related to hyperbolic sine function $1+k\sinh z$ for $0 k \frac{1}{\sinh1}$. We determine the upper bound of generalized Fekete-Szeg\"{o} functional and second Hankel determinant of given bi-univalent classes.- 15 October 2026
- Published by Universitatea din Oradea in Analele Universității din Oradea, fascicola Matematica
- Vol. 33 (2) , 271-290
Hankel determinants of certain subclasses of bi-univalent functions associated with hyperbolic sine function
In this article, we discuss the concepts of bi-starlike and bi-convex functions related to hyperbolic sine function $1+k\sinh z$ for $0 k \frac{1}{\sinh1}$. We determine the upper bound of generalized Fekete-Szeg\"{o} functional and second Hankel determinant of given bi-univalent classes.- Open Access
Sharp Estimates for q-Convex Functions and the Associated Classical Family
In this article, we introduce and study two new subclasses of analytic univalent functions defined via the Ma–Minda function. Specifically, we consider the class of q-convex functions involving a suitable Ma–Minda function together with its classical counterpart corresponding to where We determine bounds for the first few Taylor–Maclaurin coefficients and deduce Fekete–Szegö and Kruskal inequality. Moreover, we obtain the associated Toeplitz determinants related to this class. We highlight several new consequences of our results that are of independent interest in geometric function theory.Open AccessSharp Estimates for q-Convex Functions and the Associated Classical Family
In this article, we introduce and study two new subclasses of analytic univalent functions defined via the Ma–Minda function. Specifically, we consider the class of q-convex functions involving a suitable Ma–Minda function together with its classical counterpart corresponding to where We determine bounds for the first few Taylor–Maclaurin coefficients and deduce Fekete–Szegö and Kruskal inequality. Moreover, we obtain the associated Toeplitz determinants related to this class. We highlight several new consequences of our results that are of independent interest in geometric function theory. - Open Access
- 22 February 2026
- Published by SIGMA (Symmetry, Integrability and Geometry: Methods and Application) in Ukrains’kyi Matematychnyi Zhurnal
- Vol. 74 (11) , 1533-1543
On a class of analytic functions closely related to a class defined by Silverman and Silvia
UDC 517.5 We define and study a class of analytic functions in the unit disc by using the modification of the well-known Silverman and Silvia's analytic formula for starlike functions with respect to a boundary point. The representation theorem, as well as growth and distortion theorems are established for the new class of functions. Further, early coefficients of the new class of functions are also estimated.
- 22 February 2026
- Published by SIGMA (Symmetry, Integrability and Geometry: Methods and Application) in Ukrains’kyi Matematychnyi Zhurnal
- Vol. 74 (11) , 1533-1543
Open AccessOn a class of analytic functions closely related to a class defined by Silverman and Silvia
UDC 517.5 We define and study a class of analytic functions in the unit disc by using the modification of the well-known Silverman and Silvia's analytic formula for starlike functions with respect to a boundary point. The representation theorem, as well as growth and distortion theorems are established for the new class of functions. Further, early coefficients of the new class of functions are also estimated.
- Open Access
- 1 January 2026
- Published by Wiley in Journal of Function Spaces
- Vol. 2026 (1)
Starlike Functions With Respect to a Boundary Point Connected With Bounded Radius Rotation
In the current article, we introduce a new subclass of univalent function with bounded radius rotation. For this new class, the authors establish many interesting relations between these classes and existing classes. Furthermore, authors try to find coefficient estimations for this new subclass. A few examples of the functions belonging to the classes are also stated. MSC2010 Classification: Primary 30C45, 33C50; Secondary 30C80
- 1 January 2026
- Published by Wiley in Journal of Function Spaces
- Vol. 2026 (1)
Open AccessStarlike Functions With Respect to a Boundary Point Connected With Bounded Radius Rotation
In the current article, we introduce a new subclass of univalent function with bounded radius rotation. For this new class, the authors establish many interesting relations between these classes and existing classes. Furthermore, authors try to find coefficient estimations for this new subclass. A few examples of the functions belonging to the classes are also stated. MSC2010 Classification: Primary 30C45, 33C50; Secondary 30C80
- Open Access
- 1 January 2026
- Published by Wilmington Scientific Publisher, LLC in Journal of Applied Analysis & Computation
- Vol. 16 (2) , 705-723
INITIAL COEFFICIENT BOUNDS FOR NEW SUBCLASSES OF M-FOLD SYMMETRIC BI-UNIVALENT FUNCTIONS WITH BOUNDED BOUNDARY ROTATION
In the present article, the authors introduce the concept of m-fold symmetric bi-univalent functions with bounded boundary rotation and introduce three new subclasses of m-fold symmetric bi-univalent functions. For the newly defined classes, the authors obtain first two initial coefficient bounds. Furthermore, the Fekete-Szegö bounds are also obtained for these three new classes of functions. Apart from many new results and new corollaries, the results in this article also improves earlier existing bounds available in the literature.
- 1 January 2026
- Published by Wilmington Scientific Publisher, LLC in Journal of Applied Analysis & Computation
- Vol. 16 (2) , 705-723
Open AccessINITIAL COEFFICIENT BOUNDS FOR NEW SUBCLASSES OF M-FOLD SYMMETRIC BI-UNIVALENT FUNCTIONS WITH BOUNDED BOUNDARY ROTATION
In the present article, the authors introduce the concept of m-fold symmetric bi-univalent functions with bounded boundary rotation and introduce three new subclasses of m-fold symmetric bi-univalent functions. For the newly defined classes, the authors obtain first two initial coefficient bounds. Furthermore, the Fekete-Szegö bounds are also obtained for these three new classes of functions. Apart from many new results and new corollaries, the results in this article also improves earlier existing bounds available in the literature.
- Open Access
Notes on a New Class of Univalent Starlike Functions with Respect to a Boundary Point
This article presents a newly defined subclass of univalent functions that are starlike with respect to a boundary point, closely related to the Robertson class and specifically associated with a vertical strip domain. Additionally, this study derives generalized coefficient estimates for these classes, as well as for the Robertson class linked to the Nephroid domain and the Lemniscate of Bernoulli.
Open AccessNotes on a New Class of Univalent Starlike Functions with Respect to a Boundary Point
This article presents a newly defined subclass of univalent functions that are starlike with respect to a boundary point, closely related to the Robertson class and specifically associated with a vertical strip domain. Additionally, this study derives generalized coefficient estimates for these classes, as well as for the Robertson class linked to the Nephroid domain and the Lemniscate of Bernoulli.
- 29 July 2025
- Published by Springer Nature in Iranian Journal of Science
- Vol. 50 (1) , 123-131
The Fekete-Szegö Inequality for Prestarlike Functions Using Subordination
- 29 July 2025
- Published by Springer Nature in Iranian Journal of Science
- Vol. 50 (1) , 123-131
The Fekete-Szegö Inequality for Prestarlike Functions Using Subordination
- Open Access
Inverse and Logarithmic Coefficient Bounds of Concave Univalent Functions
The concept of coefficient estimates on univalent functions is one of the interesting aspects explored recently by many researchers. Motivated by this direction, in this present work, we obtain the upper bounds of initial inverse coefficients and logarithmic coefficients and the upper bounds of differences between these successive coefficients related to concave univalent functions. Further, we also calculate the upper bounds of third-order Hankel, Toeplitz, and Vandermonde determinants in terms of specified coefficients connected to concave univalent functions.
Open AccessInverse and Logarithmic Coefficient Bounds of Concave Univalent Functions
The concept of coefficient estimates on univalent functions is one of the interesting aspects explored recently by many researchers. Motivated by this direction, in this present work, we obtain the upper bounds of initial inverse coefficients and logarithmic coefficients and the upper bounds of differences between these successive coefficients related to concave univalent functions. Further, we also calculate the upper bounds of third-order Hankel, Toeplitz, and Vandermonde determinants in terms of specified coefficients connected to concave univalent functions.
- Open Access
- 11 July 2025
- Published by MDPI AG in Mathematics
- Vol. 13 (14) , 2252
Initial Coefficient Bounds for Bi-Close-to-Convex and Bi-Quasi-Convex Functions with Bounded Boundary Rotation Associated with q-Sălăgean Operator
In this article, through the application of the q-Sălăgean operator associated with functions characterized by bounded boundary rotation, we propose a few new subclasses of bi-univalent functions that utilize the q-Sălăgean operator with bounded boundary rotation in the open unit disk . For these classes, we establish the initial bounds for the coefficients and . Additionally, we have derived the well-known Fekete–Szegö inequality for this newly defined subclasses.- 11 July 2025
- Published by MDPI AG in Mathematics
- Vol. 13 (14) , 2252
Open AccessInitial Coefficient Bounds for Bi-Close-to-Convex and Bi-Quasi-Convex Functions with Bounded Boundary Rotation Associated with q-Sălăgean Operator
In this article, through the application of the q-Sălăgean operator associated with functions characterized by bounded boundary rotation, we propose a few new subclasses of bi-univalent functions that utilize the q-Sălăgean operator with bounded boundary rotation in the open unit disk . For these classes, we establish the initial bounds for the coefficients and . Additionally, we have derived the well-known Fekete–Szegö inequality for this newly defined subclasses. - Open Access
- 8 February 2025
- Published by MDPI AG in Mathematics
- Vol. 13 (4) , 569
Results of Certain Subclasses of Univalent Function Related to Bessel Functions
In this article, we established the necessary and sufficient conditions as well as the inclusion relations for a few subclasses of univalent functions associated with Bessel functions. Furthermore, we investigated an integral operator linked to Bessel functions and elaborated on several mapping properties. The study includes various theorems, corollaries and the consequences derived from the main results.
- 8 February 2025
- Published by MDPI AG in Mathematics
- Vol. 13 (4) , 569
Open AccessResults of Certain Subclasses of Univalent Function Related to Bessel Functions
In this article, we established the necessary and sufficient conditions as well as the inclusion relations for a few subclasses of univalent functions associated with Bessel functions. Furthermore, we investigated an integral operator linked to Bessel functions and elaborated on several mapping properties. The study includes various theorems, corollaries and the consequences derived from the main results.