使用不同于已有文献中的研究方法,主要是利用角域内的Nevanlinna理论,得到了二阶微分方程f"+A(z)f=0解与其导数零点之间的关系。
With the theory of Nevanlinna in an angular domain, the author obtains the relation between the zeros of solutions of f"+A (z)f=0 and that of its derivatives ,where A (z) is an entire function.