The H-refined abc conjecture

For nNn\in\mathbb{N}, let γ(n)=pnp\gamma(n)=\prod_{p\mid n}p and let ω(n)\omega(n) denote the number of distinct prime factors of nn. Define

H(n):=γ(n)(logγ(n))ω(n).H(n):=\frac{\gamma(n)}{(\log\gamma(n))^{\omega(n)}}.

The convention 00=10^0=1 is used when n=1n=1. The H-refined abc conjecture. For every ϵ>0\epsilon>0, there exists a constant C(ϵ)C(\epsilon) such that for all (a,b,c)N3(a,b,c)\in\mathbb{N}^3 with gcd(a,b,c)=1\gcd(a,b,c)=1 and a+b=ca+b=c,

c<C(ϵ)H(abc)1+ϵ.c<C(\epsilon)H(abc)^{1+\epsilon}.

The paper proposes this as a stronger abc-type conjecture because HH is intended to retain more arithmetic information than the radical. The source states applications and heuristics for it, but gives no resolution.

Sources & referencesView supporting material

Primary source

Patrick Letendre, “The abc Conjecture Revisited”, arXiv:2607.07641 (2026).

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