期刊
MEDITERRANEAN JOURNAL OF MATHEMATICS
卷 19, 期 1, 页码 -出版社
SPRINGER BASEL AG
DOI: 10.1007/s00009-021-01934-y
关键词
Univalent functions; Ozaki close-to-convex functions; Hankel; Toeplitz; Hermitian-Toeplitz; determinants; coefficients; Zalcman functional
This article explores sharp bounds for multiple determinants of functions in the class of Ozaki close-to-convex functions, as well as a sharp bound for the Zalcman functional J(2,3)(f).
Let f be analytic in D = {z is an element of C : vertical bar z vertical bar < 1}, and be given by f(z) = z + Sigma(infinity)(n=2) a(n)z(n). We give sharp bounds for the second Hankel determinant, some Toeplitz, and some Hermitian-Toeplitz determinants of functions in the class of Ozaki close-to-convex functions, together with a sharp bound for the Zalcman functional J(2,3)(f).
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