讨论了这类问题解的存在性，唯一性和稳定性。
The paper also provides a study of the existence, uniqueness, and stability of the solution.
证明了方程组解的存在性和唯一性。
We prove the existence and uniqueness of the solution of the system.
给出了其极限环存在性、唯一性以及稳定性的证明。
It is not satisfied general condition for existence of a stable limit cycle.
给出了其极限环存在性、唯一性以及稳定性的证明。
It is not satisfied general condition for existence of a stable limit cycle.
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