Authors: Georgia Irina Oros
Abstract
We find conditions on the complex-valued functions A,B,C,D in the unit disc U such that the differential inequality
|A(z)z
2p''(z)+B(z)p
2(z)+C(z)p(z)+D(z)| < M
implies |p(z)| < N, where p is analytic in U, with p(0)=0.
Faculty of Mathematics and Computer Science
Babes-Bolyai University
3400 Cluj-Napoca, Romania
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