Joint-distribution independence conjecture for consecutive values of Ω\Omega

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Let Ω(n)\Omega(n) denote the total number of prime factors of nn, counted with multiplicity, let [N]={1,…,N}[N]=\{1,\ldots,N\}, and for a finite set SS write Ex∈Sf(x)=∣S∣−1∑x∈Sf(x)\mathbb{E}_{x\in S}f(x)=|S|^{-1}\sum_{x\in S}f(x). Joint-distribution independence conjecture. For any k∈Nk\in\mathbb{N} and any bounded function a ⁣:Nk→Ca\colon\mathbb{N}^k\to\mathbb{C},

En∈[N]a(Ω(n),Ω(n+1),…,Ω(n+k−1))=E(n1,…,nk)∈[N]ka(Ω(n1),…,Ω(nk))+oN→∞(1).\mathbb{E}_{n\in[N]}a\bigl(\Omega(n),\Omega(n+1),\ldots,\Omega(n+k-1)\bigr)=\mathbb{E}_{(n_1,\ldots,n_k)\in[N]^k}a\bigl(\Omega(n_1),\ldots,\Omega(n_k)\bigr)+o_{N\to\infty}(1).

This is presented as an equivalent formulation of the almost-prime independence conjecture and expresses asymptotic independence of the joint distribution of consecutive values of Ω\Omega. The paper states that the equivalent formulation remains open.

References

Primary source

Dimitrios Charamaras and Florian K. Richter, “Asymptotic independence of Ω(n) and Ω(n+1) along logarithmic averages”, arXiv:2412.17583 (2025).

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