FormalConjectures/ErdosProblems/495.lean

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Explanation legend Lean4 Domain Explanation Language (L4DEL)

L4DEL explanations are a separate layer. They do not change the Lean source. Intuition is explanatory prose; numbered items are a reading path; sources link the wording back to evidence.

L4DEL
Lean4 Domain Explanation Language

Credit: The upstream authors and contributors retain credit for the project and mathematics. lean4-explainer only renders their pinned source and adds the separately disclosed explanation layer.

Project sources: Pinned project documentation, Formal Conjectures paper, arXiv v1

1 declarations, 1 contain sorry, 0 declared as axioms

Erdős Problem 495

Reference: erdosproblems.com/495

Imports (1)
  1. theorem Erdos495.erdos_495 Let $\alpha,\beta \in \mathbb{R}$ sorry line 37 source

    Source documentation

    Let $\alpha,\beta \in \mathbb{R}$. Is it true that$$\liminf_{n\to \infty} n \| n\alpha \| \| n\beta\| =0$$? This is also known as the Littlewood conjecture.

    depends on sorry what this means

    Statement uses: Iff, True, Real, Eq, Filter.liminf, Nat, HMul.hMul, distToNearestInt, Filter.atTop, OfNat.ofNat

    Proof uses: sorryAx, Lean.Name, Bool.false, Lean.Name.num, Lean.Name.str, Lean.Name.anonymous

    19 instances, coercions and auxiliary constants left out.

    Tactic trace: 1 steps

    Open to load the checked before-and-after goal states.

    theorem erdos_495 : answer(sorry) ↔ ∀ α β : ℝ, liminf (fun n : ℕ ↦ (n : ℝ) * distToNearestInt (n * α)
      * distToNearestInt (n * β)) atTop = 0 := by sorry
    …

    Mentions: distToNearestInt