二阶微分方程解的下级与型

张少华, 吴昭君, 孙道椿

The Lower Order and Type of Solutions of Second Order Differential Equation

ZHANG Shao-hua, WU Zhao-jun, SUN Dao-chun

数学季刊 . 2014, (1): 14 -21 . DOI: 10.13371/j.cnki.chin.q.j.m.2014.01.003