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three-point difference equations 三点式差分方程
nine-point scheme elliptic difference equations 九点格式椭圆型差分方程
Euler equations of generalized Riemann variable are derived from unsteady primitive variable Euler equations and solved by using two - a point-two-step upwind finite difference method.
该方法将原参数非定常欧拉方程组重新组合成以广义黎曼变量表示的欧拉方程组，再用二点二步迎风格式离散求解。
The focal point is to construct a new embedding overlapped iterative algorithm for solving one-dimensional implicit difference equations.
主要构造了求解一维隐式差分方程的四点嵌套迭代并行算法，并证明了它的收敛性。
Based on the fixed point theorem of two-point extension type, sufficient conditions are derived for the existence of positive periodic solutions of delay difference equations.
利用两点拉伸型不动点定理给出一阶时滞差分方程周期解存在性的充分条件。
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