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A positive Siegel theorem: Dynkin friezes and positive Mordell-Schinzel

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arxiv 2503.08800 v3 pith:JG4UD2BM submitted 2025-03-11 math.NT math.COmath.RA

A positive Siegel theorem: Dynkin friezes and positive Mordell-Schinzel

classification math.NT math.COmath.RA
keywords positiveintegralapplicationfriezesnumbertheoryaffinealgebras
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We determine the number of positive integral points on $n$-dimensional affine varieties associated to arbitrary $n \times n$ generalized Cartan matrices. An application to the theory of cluster algebras and combinatorics is the resolution of the Fontaine-Plamondon conjecture, which says that there are exactly $4400$ and $26952$ positive integral friezes of type $E_7$ and $E_8$ respectively. An application to number theory refines and generalizes theorems of Mohanty, Mordell, and Schinzel to the positive integers and higher dimensions by exhibiting examples of Diophantine equations $xyz = G(x, y)$ and $xyzw = G(x, y, z)$ of every degree greater than $3$ with infinitely many positive integral solutions.

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Cited by 2 Pith papers

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

  1. On maximal Dynkin friezes

    math.CO 2026-06 unverdicted novelty 6.0

    Explicit constructions on affine cluster varieties produce B_n and D_n Dynkin friezes over positive integers with largest entries F_{n+1}F_{n+2}-1 and F_n F_{n+1}-1 respectively, conjectured to be maximal.

  2. Frieze patterns in representation theory

    math.RT 2025-09 unverdicted novelty 1.0

    A survey of results linking frieze patterns to polygon triangulations, Grassmannian cluster algebras, and Grassmannian cluster categories, with focus on recent links to cluster categories.