This paper deals with planar piecewise linear slow–fast Liénard differential systems with three zones separated by two vertical lines. We show the existence and uniqueness of canard limit cycles for systems with a unique singular point located in the middle zone.

中文翻译：

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具有三个区域的分段线性 Liénard 系统的鸭式极限环

本文处理平面分段线性慢-快 Liénard 微分系统，其中三个区域由两条垂直线隔开。我们展示了具有位于中间区域的唯一奇异点的系统的鸭式极限环的存在性和唯一性。