5 papers · 1 filter
First-order Schwartian derivative and some classes of univalent functions
Milutin Obradovic, Nikola Tuneski
In this paper we give estimate of , where is the Schwartian derivative,…
On some properties of bi-univalent functions in the unit disc
Milutin Obradović, Nikola Tuneski, Paweł Zaprawa
In this paper we use a method based on the Grunsky coefficients to find upper bounds of the modulus of the initial coefficients, difference of the moduli of two consecutive initial…
On some properties of logarithmic coefficients of inverse of univalent functions
Milutin Obradović, Nikola Tuneski, Paweł Zaprawa
In this paper we consider some properties of the initial logarithmic coefficients for inverse functions of functions univalent in the unit disc. The case of convex functions is tre…
Toeplitz and symmetric Toeplitz determinants for inverse functions of certain classes of univalent functions
Milutin Obradović, Nikola Tuneski
In this paper we investigate Toeplitz and symmetric Toeplitz determinants of inverse functions for some classes of univalent functions and improve some previous results.
The Third Hankel determinant for inverse coefficients of bounded turning functions
Mohsan Raza, Nikola Tuneski
In this paper, we obtain sharp bounds for the third Hankel determinants of the coefficients of the inverse of bounded turning functions. Thus answering a negatively to a conjecture…