Key points are not available for this paper at this time.
In the present paper, the estimate of the third Hankel determinant aligned aligned H₃, ₁ (f) &= vmatrix a₁&a₂&a₃ \\ a₂&a₃&a₄ \\ a₃&a₄&a₅ vmatrix aligned aligned for the class of starlike functions, i. e. , for the class of analytic functions f standardly normalized such that {Re} (zf' (z) /f (z) ) > 0, \ z { {D}}: =\z { {C}: |z|<1\}, is improved.
Kwon et al. (Sat,) studied this question.