Journal
SYMMETRY-BASEL
Volume 11, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/sym11050598
Keywords
subordinations; exponential function; Hankel determinant
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Funding
- School of Mathematics and Statistics, Anyang Normal University, Anyan, Henan, China
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In the current article, we consider certain subfamilies and of univalent functions associated with exponential functions which are symmetric along real axis in the region of open unit disk. For these classes our aim is to find the bounds of Hankel determinant of order three. Further, the estimate of third Hankel determinant for the family in this work improve the bounds which was investigated recently. Moreover, the same bounds have been investigated for 2-fold symmetric and 3-fold symmetric functions.
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