School of Physical Sciences
Jawaharlal Nehru University, New Delhi
Title : Geometric function theory: in the context of analytic and harmonic univalent mappings
Speaker: Priyabrat Gochhayat
Department of Mathematics, Sambalpur University
Date: March– 03 -2020,Time: 4.00 pm, Tuesday, Venue: Seminar Room, SPS
Abstract
Geometric function theory deals with interplay of geometry and the mapping propertiesof analytic functions. The notion of univalent functions play vital role therein. Analogously harmonic univalent mappings have attracted the serious attention of complex analysts only recently after the appearance of seminal work by Clunie and Sheil-Small in 1984. These researchers laid the foundation for the study of harmonic univalent mappings over the unit disk as a generalization of analytic univalent functions. Interestingly, almost at the same time, the famous Bieberbach conjecture which was posed in 1916 by L. Bieberbach and was settled by Louiz de-Branges in 1985. Harmonic univalent mappings are very close to the conformal mappings. But, unlikely to conformal mappings, harmonic univalent mappings are not at all determined with their image domains. Although analogues of the classical growth and distortion theorems, covering theorems, and coefficient estimates are known for suitably normalized subclasses of harmonic univalent mappings, still many fundamental questions and conjectures remain unresolved in this area. There is a great expectation that the "harmonic Koebe function" will play the extremal role in many of these problems, much like the role played by the Koebe function in the classical theory of analytic univalent functions. In the present talk we will discuss some of the geometric properties of analytic univalent functions and its harmonic analogous. An attempt shall be made to discuss some of the open problems in different context.
SEMINAR –IN-CHARGE