Normal Families and Shared Values of Meromorphic Functions

Xiaoyi Liu1
1Department of Mathematics, Changshu Institute of Technology, Changshu, China

Tóm tắt

Let a and b be two given meromorphic functions on a domain D. We study normality of the family $$\mathcal {F}$$ of meromorphic functions that satisfy $$f(z)f ^{(k)}(z) = a(z) \Leftrightarrow f^{(k)}(z) = b(z)$$ for every $$f\in \mathcal {F}$$ on D. Examples are also given to show the necessity of the conditions in our results.

Tài liệu tham khảo

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