1. On a region of values in the class of typically real functions.
- Author
-
Goluzina, E.
- Subjects
MATHEMATICAL functions ,DIFFERENTIAL equations ,ALGEBRAIC functions ,MATHEMATICAL analysis ,SET theory - Abstract
The paper studies the regions of values of the systems {f(z
1 ), f(r1 ), f(r2 ),..., f(rn )} and {f(r1 ), f(r2 ),..., f (rn )}, where n 2; z1 is an arbitrary fixed point of the disk U = {z: |z| < 1} with Im z1 ≠ 0; rj are fixed numbers, 0 < rj < 1, j = 1, 2,..., n; f ∈ T, and the class T consists of the functions f(z), f(0) = 0, f′(0) = 1, regular in the disk U and satisfying the condition Im f(z) · Imz > 0 for Im z ≠ 0. As an implication, the region of values of f(z1 ) in the subclass of functions f ∈ T with prescribed values f(rj ) (j = 1, 2,..., n) is determined. Bibliography: 12 titles. [ABSTRACT FROM AUTHOR]- Published
- 2008
- Full Text
- View/download PDF