Semnan University International Journal of Nonlinear Analysis and Applications 2008-6822 12 Special Issue 2021 12 16 New results on fourth-order Hankel determinants for convex functions related to the sine function 2339 2352 6269 10.22075/ijnaa.2021.6269 EN Bassim Kareem Mihsin Department of Mathematics, College of Science, Mustansiriyah University, Baghdad, Iraq Waggas Galib Atshan Department of Mathematics, College of Science, University of Al-Qadisiyah, Diwaniyah, Iraq Shatha S. Alhily Department of Mathematics, College of Science, Mustansiriyah University, Baghdad, Iraq Journal Article 2021 10 05 In this paper, we give an upper bound for the fourth Hankel determinant $H_4 (1)$ for a new class $\mathcal{S}^{\#}_{\mathcal{C}}$ associated with the sine function. https://ijnaa.semnan.ac.ir/article_6269_b0cf08bac9399926e2d9e7c2682f88d9.pdf