摘要：Let c be a nonzero constant and n a positive integer, let f be a transcendental meromorphic function of finite order, and let R be a nonconstant rational function. Under some conditions, we study the relationships between the exponent of convergence of zero points of $f-R$ , its shift $f(z nc)$ and the differences $\Delta _{c}^{n} f$ .
关键词：Meromorphic functions; Value distribution; Rational functions;
Differences
