Supercongruence conjecture for hypercubic, hyper-octahedral and simplicial families

From papers

Let FN(t)=n=0N1fntnF_N(t)=\sum_{n=0}^{N-1}f_nt^n be the truncation of F(t)F(t) at tNt^N, and let ttσt\mapsto t^\sigma be the excellent Frobenius lift. The congruence

F(t)F(tσ)Fmps(t)Fmps1(tσ)modps\frac{F(t)}{F(t^\sigma)}\equiv \frac{F_{mp^s}(t)}{F_{mp^{s-1}}(t^\sigma)}\mod{p^s}

holds for every m,s1m,s\geq 1. Supercongruence conjecture. The same congruence holds modulo p2sp^{2s} for m=2m=2 in the hypercubic and hyper-octahedral families, and for m=n+1m=n+1 in the simplicial families. Numerical experiments support this strengthening, but it has not been proved for any example of gg in the source.

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Sources & referencesView supporting material

Primary source

Frits Beukers and Masha Vlasenko, “Dwork crystals III: from excellent Frobenius lifts towards supercongruences”, arXiv:2105.14841 (2023).

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