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 Generalized Yang's Conjecture on the periodicity of entire functions Bull. Korean Math. Soc.Published online March 3, 2020 Kai Liu, Yuming Wei, and Peiyong Yu Nanchang University Abstract : On the periodicity of transcendental entire functions, Yang's Conjecture is proposed in [7,14]. In the paper, we mainly consider and obtain partial results on a general version of Yang's Conjecture, namely, if $f(z)^{n}f^{(k)}(z)$ is a periodic function, then $f(z)$ is also a periodic function. In addition, we prove that if $f(z)^{n}+f^{(k)}(z)$ is a periodic function, then $f(z)$ is also a periodic function, where $n,k$ are positive integers. Keywords : Entire functions; Periodicity; Differential-difference equations. MSC numbers : 30D35, 39A05. Full-Text :