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微分方程的阶
order of a differential equation
- 利用锥上的不动点定理给出了超线性四阶微分方程的奇异边值问题一种情况下的正解的存在性.
The existence of positive solutions is established for a superlinear singular boundary value problem of fourth order differential equations by using a fixed point theorem in a cone. - 对于一个只含有一个单独电感或一个单独电容的电路，描述它的微分方程是一阶的，故称为一阶电路。
A circuit containing either a single inductor or a single capacitor, which can be described by a first-order differential equation, is called a first-order circuit . - 讨论了三阶变系数齐次线性微分方程可降阶的3个充分条件,它是文献[1～2]中相关结论的改进和发展。
Studied the reduced sufficient conditions which third order homogeneous linear differential equation with varied coefficient. They are improvements and expansions for some results of [1~2].
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