T-NEIGHBORHOODS IN VARIOUS CLASSES OF ANALYTIC FUNCTIONS

Saeid Shams, Ali Ebadian, Mahta Sayadiazar, Janusz Sokol
2014 Bulletin of the Korean Mathematical Society  
Let A be the class of analytic functions f in the open unit disk U = {z : |z| < 1} with the normalization conditions f n=2 anz n and δ > 0 are given, then the T δ -neighborhood of the function f is defined as
doi:10.4134/bkms.2014.51.3.659 fatcat:3onyssoivzfqhafzjmazko2que