Mixed linear-quadratic nonrecurrence conjecture for minimal systems

From papers

Let (X,T)(X,T) and (X,S)(X,S) be minimal systems on the same compact space XX. Mixed linear-quadratic nonrecurrence conjecture. There are minimal systems (X,T)(X,T) and (X,S)(X,S) such that for any xXx\in X there is no subsequence {ni}\{n_i\} of Z\mathbb{Z}, with nin_i\to\infty, satisfying

Tnixx,T2nixx,Sni2xx.T^{n_i}x\to x,\qquad T^{2n_i}x\to x,\qquad S^{n_i^2}x\to x.

This is a stronger mixed-recurrence obstruction involving two iterates of TT and a quadratic iterate of SS; the source presents it as open.

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Sources & referencesView supporting material

Primary source

Wen Huang, Song Shao and Xiangdong Ye, “Multiple recurrence without commutativity”, arXiv:2409.07979 (2024).

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