6 citations · 6 across the 2 of their papers we have counts for
5 papers · 1 filter
Radius of Close-to-convexity of Harmonic Functions
David Kalaj, Saminathan Ponnusamy, Matti Vuorinen
Let denote the class of all normalized complex-valued harmonic functions in the unit disk , and let denote the harmonic Koeb…
Bi-Harmonic mappings and J. C. C. Nitsche type conjecture
David Kalaj, Saminathan Ponnusamy
In this note it is formulated the J. C. C. Nitsche type conjecture for bi-harmonic mappings. The conjecture has been motivated by the radial bi-harmonic mappings between annuli.
On the Fekete-Szegö problem for concave univalent functions
B. Bhowmik, S. Ponnusamy, K-J. Wirths
We consider the Fekete-Szegö problem with real parameter for the class of concave univalent functions.
Region of variability for certain classes of univalent functions satisfying differential inequalities
S. Ponnusamy, A. Vasudevarao, M. Vuorinen
In this paper we determine the region of variability for certain subclasses of univalent functions satisfying differential inequalities. In the final section we graphically illustr…
Region of Variability for Spirallike Functions with Respect to a Boundary Point
S. Ponnusamy, A. Vasudevarao, M. Vuorinen
In this paper we determine the region of variability for spirallike funcions with respect to a boundary point. In the final section we graphically illustrate the region of variabil…