FormalConjectures/ErdosProblems/1203.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

3 declarations, 2 contain sorry, 0 declared as axioms

Erdős Problem 1203

References:

Imports (1)
  1. def Erdos1203.F If $\omega(n)$ counts the number of distinct prime divisors of $n$ then let $F(n)=\max_k \omega(n+k)\frac{\log\log k}{\log k}.$ line 38 source

    Source documentation

    If $\omega(n)$ counts the number of distinct prime divisors of $n$ then let $F(n)=\max_k \omega(n+k)\frac{\log\log k}{\log k}.$

    standard axioms: Classical.choice, Quot.sound, propext what this means

    Statement uses: Nat, Real

    Proof uses: iSup, HMul.hMul, ArithmeticFunction, ArithmeticFunction.cardDistinctFactors, HAdd.hAdd, HDiv.hDiv, Real.log

    14 instances, coercions and auxiliary constants left out.

    noncomputable def F (n : ℕ) : ℝ :=
    …
  2. theorem Erdos1203.erdos_1203 Prove that $F(n)\to \infty$ as $n\to \infty$ sorry line 45 source

    Source documentation

    Prove that $F(n)\to \infty$ as $n\to \infty$.

    depends on sorry what this means

    Statement uses: Iff, True, Filter.Tendsto, Nat, Real, Erdos1203.F, Filter.atTop

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

    5 instances, coercions and auxiliary constants left out.

    Tactic trace: 1 steps

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

    theorem erdos_1203 :
        answer(sorry) ↔ Tendsto F atTop atTop := by
    …

    Mentions: Erdos1203.F

  3. theorem Erdos1203.erdos_1203.variants.lower_bound It is easy to prove that $F(n)\geq 1-o(1)$ sorry line 53 source

    Source documentation

    It is easy to prove that $F(n)\geq 1-o(1)$.

    depends on sorry what this means

    Statement uses: Real, GT.gt, OfNat.ofNat, Filter.Eventually, Nat, GE.ge, Erdos1203.F, HSub.hSub, Filter.atTop

    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_1203.variants.lower_bound :
        ∀ ε > 0, ∀ᶠ n in atTop, F n ≥ 1 - ε := by
    …

    Mentions: Erdos1203.F