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new subclasses of meromorphic bi-univalent functions by associated with subordinate
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نویسنده
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salehian safa ,motamednezhad ahmad
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منبع
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international journal of nonlinear analysis and applications - 2021 - دوره : 12 - شماره : 2 - صفحه:61 -74
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چکیده
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in the present paper, we define two subclasses $sigma(lambda, alpha, beta)$, $sigma_{mathcal c}(alpha, beta)$ of meromorphic univalent functions and subclass $sigma_{{mathcal b},{mathcal c}}(alpha, beta, lambda)$ of meromorphic bi-univalent functions. furthermore, we obtain estimates on the general coefficients $|b_n|~(n ge1)$ for functions in the subclasses $sigma(lambda, alpha, beta)$, $sigma_{mathcal c}(alpha, beta)$ and estimates for the early coefficients of functions in subclass $sigma_{{mathcal b},{mathcal c}}(alpha, beta, lambda)$ by associated subordination. the results obtained in this paper would generalize and improve those in related works of several earlier authors.
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کلیدواژه
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meromorphic univalent functions، meromorphic bi-univalent functions، coefficients estimates، subordinate
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آدرس
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islamic azad university, gorgan branch, department of mathematics, iran, shahrood university of technology, faculty of mathematical sciences, iran
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پست الکترونیکی
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a.motamedne@gmail.com
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Authors
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