Co-primeness conjecture for odd higher-dimensional q-discrete Painlevé II equations

Let k=2m+17k=2m+1\geq 7 be odd, and define rational functions ynQ(y0,,y2m3,α,β,γ)y_n\in\mathbb{Q}(y_0,\dots,y_{2m-3},\alpha,\beta,\gamma) by the difference equation specified in the source. Odd-dimensional co-primeness conjecture. If nn>k2|n-n'|>k-2, then yny_n and yny_{n'} are co-prime. This conjecture extends the proved co-primeness result for k=5k=5 to all odd k7k\geq 7; its status is not resolved in the supplied text.

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Primary source

Naoto Okubo, “Co-primeness preserving higher dimensional extension of q-discrete Painleve I, II equations”, arXiv:1704.05403 (2017).

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