Fekete-Szegő coefficient functional for certain subclasses of close-to-star functions (Q2260768)
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| Language | Label | Description | Also known as |
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| English | Fekete-Szegő coefficient functional for certain subclasses of close-to-star functions |
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Fekete-Szegő coefficient functional for certain subclasses of close-to-star functions (English)
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12 March 2015
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Summary: We introduce some subclasses of close-to-star functions defined by subordination and obtain sharp upper bounds of the functional \(|a_3-\mu a^2_2|\), \(\mu\) real, for an analytic function \(f(z)=z+ \sum_{n=2}^{\infty}a_nz^n\), \(|z|<1\), belonging to these sub-classes.
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class of function in the disk
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coefficient estimates
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