the positive periodic solution 正周期解
almost positive periodic solution 正概周期解
Global positive periodic solution 全局周期正解
multiple positive periodic solution 多个正周期解
existence of positive periodic solution 周期解的存在性
strictly positive T-periodic solution 正T
positive almost periodic solution 正概周期解
By using the theory of topological degree, we show the existence of positive periodic solution.
然后利用拓扑度的理论确定正周期解的存在性。
参考来源 - 时变种群动力系统解的渐近性态Theorem 2.4.1. System (2.1.2) has a positive periodic solution if T＞T_0=-(ln(1-p_1))/αand is closing to T_0.
定理2．4．1若T＞T_0=-ln(1-p_1)／a且充分接近T_0时，系统(2．1．2)有一个正周期解。
参考来源 - 两类具有Holling·2,447,543篇论文数据，部分数据来源于NoteExpress
In this paper, we study mainly positive periodic solution to singular equations.
在这篇文章中，我们主要研究奇异方程的正周期解问题。
The existence of the strictly positive periodic solution of the system is proved by using coincidence degree.
利用重合度理论证明系统正周期解的存在性。
By using a well-known fixed point index theorem, we obtain the existence, multiplicity and nonexistence of positive periodic solution(s) to this equation.
利用一个著名的不动点指标定理，获得了该方程周期正解的存在性、多重性和不存在性。
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