研究方程f″+A(z)f′+B(z)f=F解的零点,其中A(z),B(z)(≠0),F(z)(≠0)是整函数,得到了方程解的不同零点收敛指数、二级不同零点收敛指数等的精确估计,改进了G.Gundersen、Ki-Ho Kwon、陈宗煊、Benharrat Beladi及作者的结果.
It investigated the zeros of solutions to the equations f″+A(z)f′+B(z)f=F,where A(z),B(z) (0),F(z)(0)were entire parametric functions.It obtained some precise estimates of the exponent of convergence of distinct zeros.The hyper-exponent of convergence of distinct zeros of the solutions to the e-quations was studied as well,which improved the results of G.Gundersen,Ki-Ho Kwon,Benharrat Beladi and the author.