arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1108.0063math.DS
收藏

联立水平集的拓扑压

Topological pressure of simultaneous level sets

Vaughn Climenhaga

摘要:

多重分形分析研究拓扑动力系统中渐近定义量的水平集。我们考虑这样的水平集上的拓扑压力函数,它既与整个相空间上的压力有关,又与条件变分原理有关。我们用它来恢复水平集的拓扑熵和豪斯多夫维数的信息。我们的方法本质上是热力学的,只需要势函数的稠密子空间的平衡态的存在性和唯一性。使用霍夫堡尔的想法,我们得到的结果,所有连续的潜力,近似他们与功能,从这个子空间。这种技术使我们能够将以前的多重分形结果从$C^{1+ε}$的情况下,$C^1$的情况下。我们考虑各态历经比$S_n ϕ/S_n ψ$,其中函数$ψ$不需要一致为正,这让我们可以研究非一致扩展映射的维度谱。我们的研究结果还涵盖了粗糙的光谱和水平集对应的更一般的限制行为。

英文摘要:

Multifractal analysis studies level sets of asymptotically defined quantities in a topological dynamical system. We consider the topological pressure function on such level sets, relating it both to the pressure on the entire phase space and to a conditional variational principle. We use this to recover information on the topological entropy and Hausdorff dimension of the level sets. Our approach is thermodynamic in nature, requiring only existence and uniqueness of equilibrium states for a dense subspace of potential functions. Using an idea of Hofbauer, we obtain results for all continuous potentials by approximating them with functions from this subspace. This technique allows us to extend a number of previous multifractal results from the $C^{1+ε}$ case to the $C^1$ case. We consider ergodic ratios $S_n ϕ/S_n ψ$ where the function $ψ$ need not be uniformly positive, which lets us study dimension spectra for non-uniformly expanding maps. Our results also cover coarse spectra and level sets corresponding to more general limiting behaviour.

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。

↑