Entire functions that share a small function with its derivative (Q864731)

By studing the properties of meromorphic functions which have few zeros and poles, the authors find all the entire functions \(f(z)\) which share a small and finite order meromorphic function \(a(z)\) with its derivative, and \(f^{(n)}(z)-a(z)=0\) wherever \(f(z)-a(z)=0(n)\geq 2\).