Polynomial simultaneous nonrecurrence conjecture for minimal systems

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Let pp and qq be integral polynomials vanishing at 00, with deg⁡p≥2\deg p\ge 2 and deg⁡q≥2\deg q\ge 2. Let (X,T)(X,T) and (X,S)(X,S) be systems on the same compact space XX. Polynomial simultaneous nonrecurrence conjecture. For any pair of such polynomials pp and qq, there are minimal systems (X,T)(X,T) and (X,S)(X,S) such that for any x∈Xx\in X there is no subsequence {ni}\{n_i\} of Z\mathbb{Z}, with ni→∞n_i\to\infty, satisfying

Tp(ni)x→xandSq(ni)x→x.T^{p(n_i)}x\to x\quad\text{and}\quad S^{q(n_i)}x\to x.

This proposes that simultaneous polynomial recurrence can fail at every point for suitably chosen minimal systems. The source presents it as open.

References

Primary source

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

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