The Cos pi Lambda Theorem
Essen, M. R.
The Hellsten-Kjellberg-Norstad inequality.- The cos??-theorem.- A generalization of the Ahlfors-Heins theorem.- The Paley conjecture.- A cos ??-problem and a differential inequality.- A counterexample.- Proof of Theorem 5.2.- Two consequences of a theorem of A. Baernstein.- On two theorems of A. Baernstein.