研究了齐次线性微分方程f″+Af=0的迭代级零点充满圆问题:设f1、f2是复方程f″+A(z)=0的两个线性无关解,其中A是整函数,令E=f1f2,文章证明了E的迭代级充满圆必是E的迭代级零点充满圆.所得结果精确了一些已有得结果。
Let f1 ,f2 be two linearly independen solution of the differential equation f″ + Af = 0 where A is an entire function. Set E =f1f2, we shall study the hype - order zero distribution of E and get some results on zero - filling discs of E.