The p-adic Littlewood conjecture

Let pp be a prime and let b1b1 be an irrational real number. Let qp=pvp(q)\lvert q\rvert_p=p^{-v_p(q)} denote the pp-adic absolute value of the integer qq, where vp(q)=max{k:pkq}v_p(q)=\max\{k:p^k\mid q\}. The pp-adic Littlewood conjecture. For every prime pp and irrational real α\alpha, one has

infq1qqpqα=0.\inf_{q\geq 1}q\cdot\lvert q\rvert_p\cdot\lVert q\alpha\rVert=0.

This is a special case of the mixed Littlewood conjecture and is equivalent, for p=2p=2, to the 22-adic Littlewood problem discussed in the paper. Its status is not resolved in the supplied text.

Sources & referencesView supporting material

Primary source

Dinis Vitorino and Ingrid Vukusic, “Some Bounds Related to the 2-adic Littlewood Conjecture”, arXiv:2506.04110 (2025).

Additional references

4 papers in this index state this conjecture (2014–2025). The statement above is taken from the most recent of them; the others are arXiv:2501.04430, arXiv:2307.00955, arXiv:1406.3594.

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