奇异点附近的复微分方程解的增长性与系数下级的关系（英文）

We investigate the growth of solutions of the following complex linear differential equation f'+ A(z)f'+ B(z)f = 0,where A(z) and B(z) are analytic functions in C-{z_0}, z_0 ∈ C. Some estimations of lower bounded of growth of solutions of the differential equation are obtained by using the concept of lower order.