FormalConjectures/OEIS/194806.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

8 declarations, 1 contain sorry, 0 declared as axioms

Size of smallest subset of $\{1, 2, \dots, n\}$ with distinct subset sums

Size of the smallest subset $S$ of $T = \{1,2,3,\dots,n\}$ such that $S \cdot S$ contains $T$, where $S \cdot S$ is the set of all products of elements of $S$.

References:

Imports (1)
  1. def OeisA194806.setProd The set of all products of elements from a Finset S line 40 source

    Source documentation

    The set of all products of elements from a Finset S.

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

    Statement uses: Finset, Nat

    Proof uses: Finset.image, Prod, HMul.hMul, Prod.fst, Prod.snd, Finset.product

    3 instances, coercions and auxiliary constants left out.

    def setProd (S : Finset ℕ) : Finset ℕ :=
    …
  2. def OeisA194806.a Size of the smallest subset $S$ of $T = \{1,2,3,\dots,n\}$ such that $S \cdot S$ contains $T$, where $S \cdot S$ is the set of all products of elements of $S$ line 48 source

    Source documentation

    Size of the smallest subset $S$ of $T = \{1,2,3,\dots,n\}$ such that $S \cdot S$ contains $T$, where $S \cdot S$ is the set of all products of elements of $S$.

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

    Statement uses: Nat

    Proof uses: dite, Eq, OfNat.ofNat, Not, Finset, Finset.Icc, Finset.filter, LE.le, OeisA194806.setProd, Finset.powerset, Membership.mem, Finset.Nonempty, Finset.image, Finset.card, Finset.min'

    14 instances, coercions and auxiliary constants left out.

    Tactic trace: 14 steps

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

    def a (n : ℕ) : ℕ :=
    …
  3. lemma OeisA194806.a_1 line 91 source

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

    Statement uses: Eq, Nat, OeisA194806.a, OfNat.ofNat

    Proof uses: Eq.refl

    2 instances, coercions and auxiliary constants left out.

    Tactic trace: 1 steps

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

  4. lemma OeisA194806.a_2 line 94 source

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

    Statement uses: Eq, Nat, OeisA194806.a, OfNat.ofNat

    Proof uses: Eq.refl

    2 instances, coercions and auxiliary constants left out.

    Tactic trace: 1 steps

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

  5. lemma OeisA194806.a_3 line 97 source

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

    Statement uses: Eq, Nat, OeisA194806.a, OfNat.ofNat

    Proof uses: Eq.refl

    2 instances, coercions and auxiliary constants left out.

    Tactic trace: 1 steps

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

  6. lemma OeisA194806.a_4 line 100 source

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

    Statement uses: Eq, Nat, OeisA194806.a, OfNat.ofNat

    Proof uses: Eq.refl

    2 instances, coercions and auxiliary constants left out.

    Tactic trace: 1 steps

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

  7. lemma OeisA194806.a_5 line 103 source

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

    Statement uses: Eq, Nat, OeisA194806.a, OfNat.ofNat

    Proof uses: Eq.refl

    2 instances, coercions and auxiliary constants left out.

    Tactic trace: 1 steps

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

  8. theorem OeisA194806.a_div_prime_counting_bounded sorry line 114 source

    depends on sorry what this means

    Statement uses: Exists, Real, Nat, LE.le, OfNat.ofNat, HDiv.hDiv, OeisA194806.a, Nat.primeCounting

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

    16 instances, coercions and auxiliary constants left out.

    Tactic trace: 1 steps

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