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Bi-Concave Functions Involving a Differential Operator
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نویسنده
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altınkaya sahsene ,yalcın sibel
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منبع
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journal of mathematical extension - 2019 - دوره : 13 - شماره : 2 - صفحه:111 -122
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چکیده
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The purpose of the present paper is to introduce a class dk,α λ,δ c0(β) of bi-concave functions defined by a differential operator. we find estimates on the taylor-maclaurin coefficients |a2| and |a3| for functions in this class. several consequences of these results are also pointed out in the form of corollaries.
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کلیدواژه
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Bi-concave functions ,differential operator ,coefficient estimates
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آدرس
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uludag university, department of mathematics, Turkey, uludag university, department of mathematics, Turkey
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پست الکترونیکی
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syalcin@uludag.edu.tr
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Authors
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