This paper has found general integral formulas of some types of two - order nonlinear ordinary differential equations by first integral.

本文对几类二阶非线性常微分方程，利用首次积分求得了其通积分公式。

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Using the contraction mapping principle, we proved a theorem about the existence of solution for initial value problem of a class of implicit ordinary differential equations of the first order.

本文应用压缩映象原理证明了一阶隐式微分方程解的存在唯一性定理。

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Using the contraction mapping principle, we proved a theorem about the existence of solution for initial value problem of a class of implicit ordinary differential equations of the first order.

本文应用压缩映象原理证明了一阶隐式微分方程解的存在唯一性定理。

youdao