2023/06/07 by Amina Riaz, Mohsan Raza
Mathematics · #Analytic and geometric function theory
paper · doi:10.1016/j.bulsci.2023.103289
openalex publication_date 2023/06/07 · crossref created 2023/06/07 · crossref issued 2023/10/01 · crossref published 2023/10/01 · crossref published-print 2023/10/01 · crossref deposited 2025/09/13 · openalex created_date 2025/10/10 · crossref indexed 2026/07/30 · openalex updated_date 2026/07/30
In this paper, sharp bounds on the Hankel determinant H 3 , 1 ( f ) : = | a 1 a 2 a 3 a 2 a 3 a 4 a 3 a 4 a 5 | are given for the functions f of the form f ( z ) = z + a 2 z 2 + ⋯ such that z f ′ ( z ) / f ( z ) or 1 + z f ″ ( z ) / f ′ ( z ) are subordinated by z + 1 + z 2 .