Search arXiv⌕ Search
Home/Archive/arXiv

arXiv · 2403.03301

Supercongruences using modular forms

Frits Beukers
View original source ↗Read source document ↗Export metadata ↓

Abstract

Many generating series of combinatorially interesting numbers have the property that the sum of the terms of order $<p$ at some suitable point is congruent to a zero of a zeta-function modulo infinitely many primes $p$. Surprisingly, very often these congruences turn out to hold modulo $p^2$ or even $p^3$. We call such congruences supercongruences and in the past 15 years an abundance of them have been discovered. In this paper we show that a large proportion of them can be explained by the use of modular functions and forms.

Explore related subjects

math.NTmath.AG

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Frits Beukers. 2025-06-16. Supercongruences using modular forms. https://arxiv.org/abs/2403.03301

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Transfer operator for the Gauss' continued fraction map. I. Structure of the eigenvalues and trace formulas

Let L be the transfer operator associated with the Gauss' continued fraction map, known also as the Gauss-Kuzmin-Wirsing operator, acting on the Banach space. In this work we prove a two-term asymptotic formula for the eigenvalues of L, show their algebraic simplicity, sign alternation pattern, and decrease in absolute value. This settles, in a stronger form, the conjectures of D. Mayer and G. Roepstorff (1988), A.J. MacLeod (1992), Ph. Flajolet and B. Vallee (1995), also supported by several other authors. Further, we find an exact series for the eigenvalues, which also gives the canonical decomposition of trace formulas due to D. Mayer (1976) and K.I. Babenko (1978). This crystallizes the contribution of each individual eigenvalue in the trace formulas.

math.NT↗
arXiv2026

Implications of Breuil-Herzig-Hu-Morra-Schraen's conjectures on Zábrádi's functor

Let $ρ$ be a smooth $n$-dimensional representation of $\mathcal{G}_{\mathbb{Q}_p}$ over $\overline{\mathbb{F}_p}$. When $ρ$ is generic and a good conjugate, the article "Conjectures and results on modular representations of $\mathrm{GL}_n(K)$ for a $p$-adic field $K$", by Breuil-Herzig-Hu-Morra-Schraen, introduces the notion of an admissible representation $Π$ of $\mathrm{GL}_n(\mathbb{Q}_p)$ compatible with $ρ$. In loc. cit., the five authors also question whether there exists some $Π$ compatible with $ρ$ from which Zábrádi's functor $\mathbf{V}_Δ$ recovers a specific representation $\overline{L}^{\boxtimes}(ρ)$ of $\mathcal{G}_{\mathbb{Q}_p}^{n-1}$, constructed from $ρ$. We give a range of results about how badly $\mathbf{V}_Δ(Π)$ behaves for an arbitrary $Π$ satisfying some weaker compatibilities with $ρ$. In particular, when $ρ$ is reducible and $n\geq 3$, no representation $Π$ compatible with $\widetilde{P}_ρ$ can satisfy $\mathbf{V}_Δ(Π)\simeq \overline{L}^{\boxtimes}(ρ)$.

math.NT↗
arXiv2026

Curves of genus two with maps of every degree to a fixed elliptic curve

We show that up to isomorphism there are exactly twenty pairs $(C,E)$, where $C$ is a genus-$2$ curve over ${\mathbf C}$, where $E$ is an elliptic curve over ${\mathbf C}$, and where for every integer $n>1$ there is a map of degree $n$ from $C$ to $E$. We also show that for every genus-$2$ curve $C$, there is an integer $n$ with $1 < n \le 59$ such that there is no minimal degree-$n$ map from $C$ to an elliptic curve.

math.NT↗