On λ-pseudo starlike functions associated with vertical strip domain.

We consider the class of λ -pseudo starlike functions f (z) = z + a 2 z 2 + a 3 z 3 + ⋯ such that z (f ′ (z)) λ / f (z) maps the open unit disk | z | < 1 onto a strip domain w with α − π 2 sin α < ℜ (w (z)) < α 2 sin α for some α , π / 2 ≤ α < π. We estimate | a 2 | , | a 3 | and solve the Fekete–Szegö problem for functions in this class. [ABSTRACT FROM AUTHOR]