
doi: 10.3390/math7050404
Let S s * be the class of normalized functions f defined in the open unit disk D = { z : | z | < 1 } such that the quantity z f ′ ( z ) f ( z ) lies in an eight-shaped region in the right-half plane and satisfying the condition z f ′ ( z ) f ( z ) ≺ 1 + sin z ( z ∈ D ) . In this paper, we aim to investigate the third-order Hankel determinant H 3 ( 1 ) and Toeplitz determinant T 3 ( 2 ) for this function class S s * associated with sine function and obtain the upper bounds of the determinants H 3 ( 1 ) and T 3 ( 2 ) .
sine function, Hankel determinant, QA1-939, starlike function, upper bound, Toeplitz determinant, Mathematics
sine function, Hankel determinant, QA1-939, starlike function, upper bound, Toeplitz determinant, Mathematics
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