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Chromatic congruences and Bernoulli numbers

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arxiv 2406.17705 v1 pith:XMPEDMT6 submitted 2024-06-25 math.AT math.GRmath.KTmath.NT

classification math.ATmath.GRmath.KTmath.NT
keywords congruencesbernoullinumberscongruenceadicapplybrown-quillencarlitz
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abstract

For every natural number $n$ and a fixed prime $p$, we prove a new congruence for the orbifold Euler characteristic of a group. The $p$-adic limit of these congruences as $n$ tends to infinity recovers the Brown-Quillen congruence. We apply these results to mapping class groups and using the Harer-Zagier formula we obtain a family of congruences for Bernoulli numbers. We show that these congruences in particular recover classical congruences for Bernoulli numbers due to Kummer, Voronoi, Carlitz, and Cohen.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Higher-Order Congruence for Reciprocal Power Sums and Generalized Lehmer-Type Products

    math.NT 2026-07 accept novelty 4.5 of 10

    Odd-order reciprocal power sums satisfy a uniform Bernoulli-polynomial congruence modulo n, and Lehmer-type products admit truncated Bell-polynomial expansions modulo n^{K+1}.

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