利用亚纯函数的Nevanlinna值分布理论,研究了一类二阶复微分方程f″+A(z).f'+B(z)f=0解的增长性,其中A(z)是方程W″'+P(z)w=0的非平凡解,P(z)是几次多项式.证明了B(z)在适当条件的假设下,方程的每一个非平凡解为无穷级的结果,推广了以前一些文献的结论.
Using Nevanlinna theory of the value distribution of meromorphic functions, the problem of the growth of solutions of f ″+ A(z)f' + B(z)f = 0 is investigated, where A(z) is a nontrivial solution of the equation w" + P(z)w = O, P(z) is a polynomial of degree n. And under the assumption of certain proper conditions of B(z), we prove a result which every nontrivial solutions f(z) of the equation is of infinite order and improve some results in previous references.