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Coefficient bounds for a generalized subclass of bounded turning functions associated with Sigmoid function | ||
| International Journal of Nonlinear Analysis and Applications | ||
| مقاله 1، دوره 14، شماره 11، بهمن 2023، صفحه 1-10 اصل مقاله (427.46 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22075/ijnaa.2023.29574.4195 | ||
| نویسندگان | ||
| Gagandeep Singh* 1؛ Gurcharanjit Singh2 | ||
| 1Department of Mathematics, Khalsa College, Amritsar-143001, Punjab, India | ||
| 2Department of Mathematics, G.N.D.U. College, Chungh-143304, Tarn-Taran(Punjab), India | ||
| تاریخ دریافت: 21 دی 1401، تاریخ بازنگری: 30 بهمن 1401، تاریخ پذیرش: 05 اسفند 1401 | ||
| چکیده | ||
| In this paper, we introduce a subclass of analytic functions associated with the Sigmoid function and determine the upper bounds for various coefficient functionals such as Fekete-Szego functional, second Hankel determinant, Zalcman functional and third Hankel determinant. Also, the concept is extended to two-fold and three-fold symmetric functions. The results proved earlier, follow as special cases of the results of this paper. | ||
| کلیدواژه‌ها | ||
| Subordination؛ Hankel determinant؛ Fekete Szego functional؛ Zalcman functional | ||
| مراجع | ||
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