On extreme points of the unit ball of a Hardy-Lorentz space
Abstract
We investigate the problem of a characterization of extreme points of the unit ball of a Hardy-Lorentz space H(()), posed by Semenov in 1978. New necessary and sufficient conditions, under which a normalized function f in H(()) belongs to this set, are found. The most complete results are obtained in the case when f is the product of an outer analytic function and a Blaschke factor.
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