OAI/NumberTheory/EgyptianFractions/MarkerCoverage.lean

GitHub source file

3 declarations, 0 contain sorry, 0 declared as axioms

  1. theorem OAI.Problem337.marker_length_ge_three line 10

    Source documentation

    An expansion containing a proper unit fraction needs at least three terms.

    theorem marker_length_ge_three {k m : ℕ} (hm : m ∈ D k) : 3 ≤ k := by
    …

    Mentions: OAI.Problem337.D

  2. theorem OAI.Problem337.D_mono_of_padding line 44

    Source documentation

    Exact marker padding implies monotonicity even at the empty small lengths.

    theorem D_mono_of_padding
        (padding : ∀ r : ℕ, 3 ≤ r → ∀ n : Fin r → ℕ, IsOneExpansion n →
          ∀ m : ℕ, (∃ i : Fin r, n i = m) →
            ∃ n' : Fin (r + 1) → ℕ,
              IsOneExpansion n' ∧ ∃ i : Fin (r + 1), n' i = m) :
        Monotone D := by
    …

    Mentions: OAI.Problem337.IsOneExpansion, OAI.Problem337.D

  3. theorem OAI.Problem337.bounded_markers_eventually line 60

    Source documentation

    Finitely many markers all occur at every sufficiently large exact length.

    theorem bounded_markers_eventually
        (hmono : Monotone D)
        (occurs : ∀ m : ℕ, 2 ≤ m → ∃ k : ℕ, m ∈ D k)
        (B : ℕ) :
        ∃ K : ℕ, ∀ k : ℕ, K ≤ k → ∀ m : ℕ, 2 ≤ m → m ≤ B → m ∈ D k := by
    …

    Mentions: OAI.Problem337.D