文中得到几个振动性准则和离散谱准则，并将这些结果应用到常微分方程。
Some oscillatory criteria and discrete spectrum criteria are given, and we can apply them to the ordinary differential equations.
提出求解常微分方程的一种新的数值方法——解析离散法。
A new numerical method, analytical discrete method, for solving ordinary differential equations is proposed.
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