English

Emergent transfinite topological dynamics

Dynamical Systems 2026-05-19 v4

Abstract

We present a canonical extension of topological dynamics to transfinite iterations, which makes precise the idea of dynamical phenomena stabilizing at different time-scales. Specifically, consider a sequence of self-maps F={fn}F=\{f_n\} of a compact metric space XX. If FF is finitely convergent, i.e. fn(x)=f(x)f_n(x)=f(x) for n>N(x)n>N(x), the fnf_n-orbits exhibit an emergent poset structure. A maximal initial segment of this poset is isomorphic to a countable ordinal ω\ge\omega. The construction is canonical: every finitely convergent sequence induces, at each point, a unique maximal transfinite orbit that is independent of any finite initial segment of the sequence and invariant under step-by-step conjugacy at each nn. For λ\lambda a countable limit ordinal, we study orbits, recurrence, limit sets and attractors at level λ\lambda, and the interplay of different ordinal levels. Moreover, we introduce the natural notion of transfinite conjugacy, that sharply refines conjugacy of limit maps alone but is strictly weaker than step-by-step conjugacy. We describe a family of new invariants of transfinite conjugacy that detect recurrence and attraction phenomena at each ordinal level. Particularizing to λ=ω\lambda=\omega recovers (and in some cases strengthens) classical results of topological dynamics, revealing that the standard theory is the first level of a richer structural landscape.

Keywords

Cite

@article{arxiv.2501.14963,
  title  = {Emergent transfinite topological dynamics},
  author = {Alessandro Della Corte and Marco Farotti},
  journal= {arXiv preprint arXiv:2501.14963},
  year   = {2026}
}
R2 v1 2026-06-28T21:17:08.805Z