OAI/NumberTheory/EgyptianFractions/MarkerCoverage.lean
3 declarations, 0 contain sorry, 0 declared as axioms
- theorem
OAI.Problem337.marker_length_ge_threeline 10Source 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
- theorem
OAI.Problem337.D_mono_of_paddingline 44Source 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
- theorem
OAI.Problem337.bounded_markers_eventuallyline 60Source 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