Let φ φ be an analytic function with the positive real parts, φ (0)= 1 φ (0)= 1 and φ^ ′ (0)> 0
φ′(0)> 0. Let f (z)= z+ a_2 z^ 2+ a_3 z^ 3+ ⋯ f (z)= z+ a 2 z 2+ a 3 z 3+⋯ be an analytic …

Second Hankel determinant for a class of analytic functions of complex order defined by
convolution Page 1 doi: 10.1515/umcsmath-2015-0020 ANNALES UNIVERSITATIS MARIAE …

Coefficient estimates for the family of starlike and convex functions of reciprocal order | Afrika
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Let ϕ be an analytic function with the positive real parts, ϕ (0)= 1 and ϕ (0)> 0. Let f (z)= z+
a2z2+ a3z3+··· be an analytic function satisfying the subordination αf (z)+(1− α) zf (z)/f (z)≺ ϕ …