... 二阶微分方程：second order differential equations 二氧化硫解吸：solution property 二维正弦光栅：two-dimension grating ...
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nonlinear second order differential equations 非线性二阶微分方程
second-order differential equations with delay 二阶时滞微分方程
Second-Order Linear Differential Equations 二阶常微分方程式
second order functional differential equations 二阶泛函微分方程
second order partial differential equations 二阶偏微分方程
second order delay differential equations 二阶时滞微分方程
second-order delay differential equations 二阶滞后型微分方程
By using fixed point theory, in this paper we study the existence of triple positive solutions for a class of second-order differential equations with integral boundary conditions.
运用不动点定理，研究了一类带积分边界条件的二阶微分方程三个正解的存在性。
The main contents of first chapter are several difference schemes of first-order and second-order differential equations.
第一章有限差分方法主要内容是一阶和二阶的两点式、三点式和五点式差分方案。
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