7. Polynomic bound for the classes of univalent functions involved sigmoid functions

  • Shimone Gartie
Keywords: Polynomic boundary, sigmoid function, univalent function, Fekete-Sego


In this paper, a novel subclasses of univalent functions were derived by using the Salagean
differential operators involved the altered sigmoid functions and the Chebysev
polynomial. The co-efficient bound and the Fekete-Sego function of these classes were
gained using sub-ordination principles. The obtained results are better than other results
found in the earlier researches.