non-polynomial differential system 非多项式微分系统
fifth polynomial differential system 五次多项式系统
planar polynomial differential system 平面多项式系统
polynomial differential system of degree 二次微分系统
seven-degree polynomial differential system 七次多项式微分系统
second order polynomial differential system 二次多项式微分系统
differential polynomial system 微分多项式系统
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