In 989,Bank,Laine and Langley raised and proved a perturbation result for second order differential equations with entire coefficients only of positive integer order.
In 989,Bank,Laine and Langley raised and proved a perturbation result for second order differential equations with entire coefficients only of positive integer order.
989年,Bank,Laine和Langley提出并证明了一个二阶微分方程的扰动结果,但方程系数仅限于正整数级的整函数.