analytic theory of differential equation 微分方程解析理论
qualitative theory of differential equation 微分方程定性理论
theory of functional differential equation [数] 函数微分方程论
The periodic wave solutions of the generalized CH equation are investigated by using bifurcation theory of differential equations and numerical simulations.
用微分方程分支理论和计算机数值模拟方法研究广义CH方程的周期波解。
With the theory of stochastic differential equation, the authors discuss a problem of a class of risk investment portfolio with stochastic character.
利用随机微分方程理论，对一类具有随机特征的风险投资组合问题进行深入研究。
The research of delay differential equation is very important in theory and in practice.
这篇文章的主要目的是研究时滞对种群生长的作用。
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