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arXiv 1202.0580math.DSmath-phmath.MP
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光滑拟周期余循环中李雅普诺夫指数不连续性的例子

Examples of Discontinuity of Lyapunov Exponent in Smooth Quasi-Periodic Cocycles

Yiqian Wang, Jiangong You

摘要:

研究了拟周期余圈$(T_ω, A)$的李雅普诺夫指数的正则性,其中$T_ω$是$\SS^1$上的无理旋转$x\to x+ 2πω$,$A\in {\cal C}^l(\SS^1, SL(2,\mathbb{R}))$,$0\le l\le \infty$ .对于任何固定的有界型$l=0, 1, 2, \cdots, \infty$和$ω$,我们构造了$D_{l}\in {\cal C}^l(\SS^1, SL(2,\mathbb{R}))$,使得在${\cal C}^l$ -拓扑中,李雅普诺夫指数在$D_{l}$处不连续.我们也构造这样的例子在一个较小的薛定谔类。

英文摘要:

We study the regularity of the Lyapunov exponent for quasi-periodic cocycles $(T_ω, A)$ where $T_ω$ is an irrational rotation $x\to x+ 2πω$ on $\SS^1$ and $A\in {\cal C}^l(\SS^1, SL(2,\mathbb{R}))$, $0\le l\le \infty$. For any fixed $l=0, 1, 2, \cdots, \infty$ and any fixed $ω$ of bounded-type, we construct $D_{l}\in {\cal C}^l(\SS^1, SL(2,\mathbb{R}))$ such that the Lyapunov exponent is not continuous at $D_{l}$ in ${\cal C}^l$-topology. We also construct such examples in a smaller Schrödinger class.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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