ESTIMATES OF THE FOURTH HANKEL DETERMINANT FOR A CLASS OF ANALYTIC FUNCTIONS WITH BOUNDED TURNINGS INVOLVING CARDIOID DOMAINS

Srivastava, HM; Kaur, G; Singh, G

Srivastava, HM (corresponding author), Univ Victoria, Dept Math & Stat, Victoria, BC V8W 3R4, Canada.; Srivastava, HM (corresponding author), China Med Univ, China Med Univ Hosp, Dept Med Res, Taichung 40402, Taiwan.; Srivastava, HM (corresponding author), Azerbaijan Univ, Dept Math & Informat, 71 Jeyhun Hajibeyli St, AZ-1007 Baku, Azerbaijan.; Srivastava, HM (corresponding author), Int Telemat Univ Uninettuno, Sect Math, I-00186 Rome, Italy.

JOURNAL OF NONLINEAR AND CONVEX ANALYSIS, 2021; 22 (3): 511