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- Publisher
- de Gruyter
- Copyright
- © 2021 Walter de Gruyter GmbH, Berlin/Boston
- ISSN
- 0933-7741
- eISSN
- 1435-5337
- DOI
- 10.1515/forum-2021-0188
- Publisher site
- See Article on Publisher Site
Abstract
AbstractThis paper is concerned with Hankel determinants for starlike and convexfunctions related to modified sigmoid functions. Sharp bounds are given for second and third Hankel determinants.
Journal
Forum Mathematicum – de Gruyter
Published: Jan 1, 2022
Keywords: Starlike functions; convex functions; sigmoid functions; Hankel determinants; 30C45; 30C50