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erdos_421

Specification

Is there a sequence $1 \le d_1 < d_2 < \dots$ with density 1 such that all products $\prod_{u \le i \le v} d_i$ are distinct?

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Lean 4 Statement 
theorem erdos_421 : answer(sorry) ↔
    ∃ (d : ℕ → ℕ), StrictMono d ∧ 1 ≤ d 0 ∧ HasDensity (Set.range d) 1 ∧
    {(u, v) : ℕ × ℕ | u ≤ v}.InjOn fun (u, v) => ∏ i ∈ Finset.Icc u v, d i
ID: ErdosProblems__421__erdos_421
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