Fekete -Szego Results for Some Classes of Analytic Functions using Q-Difference Error Function Related to Shell Shaped Region

Abstract

The main object of this article is to obtain the coefficient estimate using q-∣ difference error function related to shell shaped region. Also we estimate ∣b3 − μb2 2 ∣ ∣ with the function h ∈ ESλ q,`(ψ(ζ)) and h ∈ ECλ q,`(ψ(ζ)) using subordination and quasi subordination.