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Dynamics of measurable functions on the interval
Topology and its Applications ( IF 0.6 ) Pub Date : 2021-03-17 , DOI: 10.1016/j.topol.2021.107664
Pamela Pierce , T.H. Steele

Let AI=[0,1] such that λA=0 and A is a dense Gδ subset of [0,1], and take M to be the set of measurable self-maps of I. There exists a residual set RM such that for each f in R, the following hold:

(1)

The range of f is contained in A, and f is a one-to-one function.

(2)

For any x[0,1], the ω-limit set ω(x,f) is nowhere dense.

(3)

The Hausdorff dimension of the ω-limit points Λ(f)=xIω(x,f) is zero.

(4)

The function f is nowhere continuous.

Any closed set E contained in [0,1] is an ω-limit set for some measurable function f:II. Moreover, there exists a measurable function f:[0,1][0,1] such that for any ε>0, x[0,1] and closed set E[0,1], there is a function g:II such that gf<ε, and E=ω(x,g).



中文翻译:

区间上可测量函数的动态

一个一世=[01个] 这样 λ一个=0而且A是一个密集的Gδ 的子集 [01个],然后 中号成为I的可测量的自映射的集合。存在残差集[R中号这样对于每一个f in[R,以下保持:

(1)

f的范围包含在A中,并且f是一对一的函数。

(2)

对于任何 X[01个]ω-极限集ωXF 无处密集。

(3)

ω-极限点的Hausdorff维数ΛF=X一世ωXF 是零。

(4)

函数f在任何地方都不是连续的。

包含在中的任何封闭集E[01个]是一些可测函数的ω-极限集F一世一世。此外,还有一个可测量的功能F[01个][01个] 这样对于任何 ε>0X[01个] 和封闭集 E[01个],有一个功能 G一世一世 这样 G-F<ε, 和 E=ωXG

更新日期:2021-03-22
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