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Zdun (\cite[Example 1.2, page 69-71]{Zdun1979-Book}) proved that there exists a map \(h\) with \[h(b)=a \]such that the local linear map \[\begin{equa 阅读全文
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Topological Entropy and Li-Yorke Chaos "Topological entropy of maps on the real line" Let \(X\) be a Hausdorff topological space and let \(f: X\to X\) 阅读全文
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《Orderary differential equations》, Jake K. Hale Floquet theory 考虑系统 \[\begin{equation} \dot{x}=A(t) x \end{equation} \]其中\(A(t)\)是 \(T-\)周期的. 考虑三个函数类: 阅读全文
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Distinguish center and focus for plane differential system 背景 对于一个平面光滑微分系统 \[\begin{equation} \dot{x}=f(x,y),~~~ \dot{y}=g(x,y). \end{equation} \]假设 \ 阅读全文