Starlike Functions Related to the Bell Numbers

Starlike Functions Related to the Bell Numbers

The present paper aims to establish the first order differential subordination relations between functions with a positive real part and starlike functions related to the Bell numbers. In addition, several sharp radii estimates for functions in the class of starlike functions associated with the Bel...

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Main Authors: Nak Eun Cho, Sushil Kumar, Virendra Kumar, V. Ravichandran, H. M. Srivastava
Format: Article
Language:English
Published: MDPI AG 2019-02-01
Series:Symmetry
Subjects:
differential subordination
starlike functions
Bell numbers
radius estimate
Online Access:https://www.mdpi.com/2073-8994/11/2/219
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spelling doaj-e8a6494dc2f442c19caba7a1ffcdd7742020-11-24T21:58:18ZengMDPI AGSymmetry2073-89942019-02-0111221910.3390/sym11020219sym11020219Starlike Functions Related to the Bell NumbersNak Eun Cho0Sushil Kumar1Virendra Kumar2V. Ravichandran3H. M. Srivastava4Department of Applied Mathematics, Pukyong National University, Busan 48513, KoreaBharati Vidyapeeth’s College of Engineering, Delhi 110063, IndiaDepartment of Mathematics, Ramanujan College, University of Delhi, Kalkaji, New Delhi 110019, IndiaDepartment of Mathematics, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, IndiaDepartment of Mathematics and Statistics, University of Victoria, Victoria, BC V8W 3R4, CanadaThe present paper aims to establish the first order differential subordination relations between functions with a positive real part and starlike functions related to the Bell numbers. In addition, several sharp radii estimates for functions in the class of starlike functions associated with the Bell numbers are determined.https://www.mdpi.com/2073-8994/11/2/219differential subordinationstarlike functionsBell numbersradius estimate
collection DOAJ
language English
format Article
sources DOAJ
author Nak Eun Cho
Sushil Kumar
Virendra Kumar
V. Ravichandran
H. M. Srivastava
spellingShingle Nak Eun Cho
Sushil Kumar
Virendra Kumar
V. Ravichandran
H. M. Srivastava
Starlike Functions Related to the Bell Numbers
Symmetry
differential subordination
starlike functions
Bell numbers
radius estimate
author_facet Nak Eun Cho
Sushil Kumar
Virendra Kumar
V. Ravichandran
H. M. Srivastava
author_sort Nak Eun Cho
title Starlike Functions Related to the Bell Numbers
title_short Starlike Functions Related to the Bell Numbers
title_full Starlike Functions Related to the Bell Numbers
title_fullStr Starlike Functions Related to the Bell Numbers
title_full_unstemmed Starlike Functions Related to the Bell Numbers
title_sort starlike functions related to the bell numbers
publisher MDPI AG
series Symmetry
issn 2073-8994
publishDate 2019-02-01
description The present paper aims to establish the first order differential subordination relations between functions with a positive real part and starlike functions related to the Bell numbers. In addition, several sharp radii estimates for functions in the class of starlike functions associated with the Bell numbers are determined.
topic differential subordination
starlike functions
Bell numbers
radius estimate
url https://www.mdpi.com/2073-8994/11/2/219
work_keys_str_mv AT nakeuncho starlikefunctionsrelatedtothebellnumbers
AT sushilkumar starlikefunctionsrelatedtothebellnumbers
AT virendrakumar starlikefunctionsrelatedtothebellnumbers
AT vravichandran starlikefunctionsrelatedtothebellnumbers
AT hmsrivastava starlikefunctionsrelatedtothebellnumbers
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