Asymptotically positive extensions and property (B)

Let L/Q\mathcal{L}/\mathbb{Q} be an infinite extension. For a prime power qq, let ψq\psi_q denote the limiting normalized number of prime ideals of norm qq in finite subextensions of L\mathcal{L}, and let K\mathcal{K} denote the set of nonzero elements of L\mathcal{L} that are not roots of unity. The extension is asymptotically positive if ψq>0\psi_q>0 for some prime power qq. Asymptotically positive extension conjecture.

lim infαKh(α)12qψqlogqq+1,\liminf_{\alpha\in\mathcal{K}}h(\alpha)\geq\frac{1}{2}\sum_q\psi_q\frac{\log q}{q+1},

where qq runs over all prime powers. Consequently, every asymptotically positive extension L\mathcal{L} has property (B). This was proposed in earlier work and is presented here as an open conjecture; property (B) asserts a positive lower bound for the height of non-torsion elements.

Sources & referencesView supporting material

Primary source

Anup B. Dixit and Sushant Kala, “On points of small height in infinite extensions”, arXiv:2404.11559 (2025).

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