검색
Article Search

JMB Journal of Microbiolog and Biotechnology

OPEN ACCESS eISSN 0454-8124
pISSN 1225-6951
QR Code

Article

Kyungpook Mathematical Journal 2022; 62(2): 243-256

Published online June 30, 2022

Copyright © Kyungpook Mathematical Journal.

Bohr’s Phenomenon for Some Univalent Harmonic Functions

Chinu Singla∗, Sushma Gupta and Sukhjit Singh

Department of Mathematics, Sant Longowal Institute of Engineering and Technology, Longowal-148106, India
e-mail : chinusingla204@gmail.com, sushmagupta1@yahoo.com and sukhjit_d@yahoo.com

Received: May 21, 2021; Revised: October 6, 2021; Accepted: October 7, 2021

Abstract

In 1914, Bohr proved that there is an r0(0,1) such that if a power series m=0cmzm is convergent in the open unit disc and | m=0cmzm|<1 then, m=0|cmzm|<1 for |z|<r0. The largest value of such r0 is called the Bohr radius. In this article, we find Bohr radius for some univalent harmonic mappings having different dilatations. We also compute the Bohr radius for functions that are convex in one direction.

Keywords: Bohr radius, harmonic univalent functions, convex in one direction