离散动力系统可积性障碍的分析方法
Analytic methods for obstruction to integrability in discrete dynamical systems
摘要:
利用广义Borel可和性技巧,证明了一类较一般的差分方程解的唯一解析延拓结果.这种延续允许Painlevé属性方法扩展到差分方程。证明了Painlevé性质(PP)在相对一般的假设下,在一阶差分方程中引入了二分法:所有具有PP的方程都可以用封闭形式求解;相反,在某些进一步的假设下,PP的缺失意味着局部守恒量在某种意义上是严格局部的,即它们在某个紧集的边界上发展出奇异壁垒.该技术产生的解析公式来描述起源于多项式迭代的分形集。
英文摘要:
A unique analytic continuation result is proved for solutions of a relatively general class of difference equations, using techniques of generalized Borel summability. This continuation allows for Painlevé property methods to be extended to difference equations. It is shown that the Painlevé property (PP) induces, under relatively general assumptions, a dichotomy within first order difference equations: all equations with PP can be solved in closed form; on the contrary, absence of PP implies, under some further assumptions, that the local conserved quantities are strictly local in the sense that they develop singularity barriers on the boundary of some compact set. The technique produces analytic formulas to describe fractal sets originating in polynomial iterations.
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