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coefficient bounds for a generalized subclass of bounded turning functions associated with sigmoid function
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نویسنده
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singh gagandeep ,singh gurcharanjit
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منبع
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international journal of nonlinear analysis and applications - 2023 - دوره : 14 - شماره : 11 - صفحه:1 -10
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چکیده
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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.
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کلیدواژه
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bounded turning functions ,subordination ,sigmoid unction ,hankel determinant ,coefficient bounds
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آدرس
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khalsa college, department of mathematics, india, g.n.d.u. college, department of mathematics, india
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پست الکترونیکی
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dhillongs82@yahoo.com
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Authors
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