一个慢性消耗性疾病模型的不变代数曲面

Invariant algebraic surfaces of a chronic wasting disease model

研究了一个由三维常微分方程组成的慢性消耗性疾病(CWD)模型,用特征曲线法求出了该系统的全部不变代数曲面,并给出广义首次积分存在的条件.

In this paper we study a chronic wasting disease(CWD) model of three dimensional ordinary differential equations.We use the method of characteristic curves to give a complete classification of this system with invariant algebraic surfaces.In addition,we give some conditions of this system on the existence of generalized first integrals.