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Turkish Journal of Mathematics

Authors

YOUMING WANG

Abstract

In this paper we study the problem of normal families of meromorphic functions concerning shared values. Let F be a family of meromorphic functions in the plane domain D \subseteq C and n be a positive integer. Let a, b be two finite complex constants such that a \neq 0. If n \geq 3 and f + a(f')^n and g + a(g')^n share b in D for every pair of functions f, g \in F, then F is normal in D. And some examples are provided to show the result is sharp.

DOI

10.3906/mat-0909-37

Keywords

Meromorphic functions, shared value, normal family

First Page

263

Last Page

271

Included in

Mathematics Commons

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