Number of deficient values of a class of meromorphic function

Abstract

We proved the following Theorem
Theorem.   Let f(z) be a meromorphic function of lower order μ<∞. If \underset{a}Σδ(a, f')=2 then we have
P₀+P₁{≤}μ+1,
where P₀, P₁ are the number of finite deficient values of f(z), f'(z) respectively.