The n-dimensional classification conjecture for bounded omega-limit sets

Let TTcolon RnRn\mathbb{R}^n\to\mathbb{R}^n be an nD map as given in Definition 1, and let A\mathcal{A} be a bounded ω\omega-limit set different from the fixed point OO or from related local invariant sets when OO is nonhyperbolic. A bounded omega-limit classification conjecture. Such a set can only be one of the following, which may coexist: a nonhyperbolic kk-cycle with k2k\geq 2, occurring in mm-dimensional sets with m<nm<n filled with cycles of the same symbolic sequence; a finite number of mm-dimensional sets with m<nm<n filled with quasiperiodic orbits; or an mmD weird quasiperiodic attractor, where 2mn2\leq m\leq n. When no cycles exist, namely in the latter two cases, A\mathcal{A} exhibits weak sensitivity to initial conditions. This conjecture proposes a general classification of bounded attractors in the authors' class of piecewise linear discontinuous maps, extending the observed two-dimensional behavior to higher dimensions; its status is not resolved in the supplied text.

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Primary source

Laura Gardini, Davide Radi, Noemi Schmitt, Iryna Sushko and Frank Westerhoff, “Abundance of weird quasiperiodic attractors in piecewise linear discontinuous maps”, arXiv:2504.04778 (2025).

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