| import Mathlib |
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| namespace OAI |
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| namespace FiniteCircle |
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| open scoped BigOperators List |
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| universe u v |
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| inductive EditStep {α : Type u} : List α → List α → Prop |
| | insert (u v : List α) (a : α) : EditStep (u ++ v) (u ++ a :: v) |
| | delete (u v : List α) (a : α) : EditStep (u ++ a :: v) (u ++ v) |
| | substitute (u v : List α) (a b : α) : EditStep (u ++ a :: v) (u ++ b :: v) |
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| inductive EditScript {α : Type u} : ℕ → List α → List α → Prop |
| | nil (x : List α) : EditScript 0 x x |
| | cons {n : ℕ} {x y z : List α} : |
| EditStep x y → EditScript n y z → EditScript (n + 1) x z |
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| noncomputable def editDistance {α : Type u} (x y : List α) : ℕ := |
| sInf {n : ℕ | EditScript n x y} |
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| noncomputable def lcs {α : Type u} (x y : List α) : ℕ := |
| sSup {n : ℕ | ∃ z : List α, z <+ x ∧ z <+ y ∧ z.length = n} |
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| noncomputable def deficit {α : Type u} (x y : List α) : ℕ := x.length - lcs x y |
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| abbrev Words (α : Type u) (d : ℕ) := {x : List α // x.length ≤ d} |
| abbrev RealL1 := lp (fun _ : ℕ => ℝ) 1 |
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| noncomputable def distortion {α : Type u} {X : Type v} (word : X → List α) |
| (f : X → RealL1) : ℝ := |
| (sSup {r : ℝ | ∃ x y : X, x ≠ y ∧ |
| r = ‖f x - f y‖ / (editDistance (word x) (word y) : ℝ)}) * |
| (sSup {r : ℝ | ∃ x y : X, x ≠ y ∧ |
| r = (editDistance (word x) (word y) : ℝ) / ‖f x - f y‖}) |
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| noncomputable def optimalDistortion {α : Type u} {X : Type v} |
| (word : X → List α) : ℝ := |
| sInf {D | ∃ f : X → RealL1, Function.Injective f ∧ D = distortion word f} |
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| noncomputable def E (α : Type u) (d : ℕ) : ℝ := |
| optimalDistortion (fun x : Words α d => x.val) |
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| noncomputable def setDistortion (S : Set (List Bool)) : ℝ := |
| optimalDistortion (fun x : S => x.val) |
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| noncomputable def alphabetSupremum (d : ℕ) : ℝ := |
| sSup {r | ∃ A : ℕ, 2 ≤ A ∧ r = E (Fin A) d} |
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| noncomputable def exponentScale (d : ℕ) : ℝ := |
| Real.sqrt (Real.log d * Real.log (Real.log d)) |
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| def encode {α : Type u} {w : ℕ} (c : α → Fin w → Bool) (x : List α) : List Bool := |
| x.flatMap (fun a => List.ofFn (c a)) |
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| def interval {α : Type u} {w : ℕ} (c : α → Fin w → Bool) |
| (a : α) (s len : ℕ) : List Bool := |
| ((List.ofFn (c a)).drop s).take len |
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| def OffsetLocal {α : Type u} {w : ℕ} (δ : ℝ) (c : α → Fin w → Bool) : Prop := |
| ∀ a b : α, a ≠ b → ∀ s t : ℕ, |
| s + w / 8 ≤ w → t + w / 8 ≤ w → |
| (lcs (interval c a s (w / 8)) (interval c b t (w / 8)) : ℝ) ≤ |
| (1 - δ) * (w / 8 : ℕ) |
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| def indexSpan {w : ℕ} (is : List (Fin w)) : ℕ := |
| match is with |
| | [] => 0 |
| | i :: js => (js.getLastD i).val + 1 - i.val |
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| def AnchorLocal {α : Type u} {w : ℕ} (ε : ℝ) (c : α → Fin w → Bool) : Prop := |
| ∀ a b : α, ∀ is js : List (Fin w), |
| is.Pairwise (fun i j => i.val < j.val) → |
| js.Pairwise (fun i j => i.val < j.val) → |
| is.length = js.length → (w : ℝ) / 4 ≤ is.length → |
| (indexSpan is - is.length : ℕ) ≤ ε * w → |
| (indexSpan js - js.length : ℕ) ≤ ε * w → |
| (∀ ij ∈ is.zip js, c a ij.1 = c b ij.2) → |
| a = b ∧ ∃ i : Fin w, (i, i) ∈ is.zip js |
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| def SubstitutionBounds {α : Type u} [Fintype α] {w : ℕ} |
| (a C : ℝ) (c : α → Fin w → Bool) : Prop := |
| 0 < w ∧ (w : ℝ) ≤ C * Real.log (2 * Fintype.card α) ∧ |
| (∀ L : ℕ, ∀ x y : List α, x.length = L → y.length = L → |
| a * w * deficit x y ≤ (deficit (encode c x) (encode c y) : ℝ) ∧ |
| deficit (encode c x) (encode c y) ≤ w * deficit x y) ∧ |
| (∀ x y : List α, editDistance (encode c x) (encode c y) ≤ w * editDistance x y) |
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| def TwoCodes (a C δ ε : ℝ) : Prop := |
| ∀ (α : Type) [Fintype α], 2 ≤ Fintype.card α → |
| (∃ (w : ℕ) (c : α → Fin w → Bool), |
| SubstitutionBounds a C c ∧ OffsetLocal δ c) ∧ |
| (∃ (w : ℕ) (c : α → Fin w → Bool), |
| SubstitutionBounds a C c ∧ AnchorLocal ε c) |
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| def period (h : ℕ) (p : ℕ → ℕ → ℕ) (l : ℕ) : ℕ := ∏ k : Fin h, p l k |
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| def circleSize (h : ℕ) (p : ℕ → ℕ → ℕ) : ℕ := |
| 2 * ∏ l : Fin h, period h p (l.val + 1) |
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| def MaskPrimes (h : ℕ) (p : ℕ → ℕ → ℕ) : Prop := |
| (∀ l k : Fin h, Nat.Prime (p (l.val + 1) k)) ∧ |
| Function.Injective (fun lk : Fin h × Fin h => p (lk.1.val + 1) lk.2) ∧ |
| ∀ l k : Fin h, h ^ 3 ≤ p (l.val + 1) k ∧ p (l.val + 1) k ≤ 2 * h ^ 3 |
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| def ExcludedPrimes (m : ℕ) (p : ℕ → ℕ → ℕ) : Prop := |
| (∀ l k : Fin m, Nat.Prime (p (l.val + 1) k)) ∧ |
| Function.Injective (fun lk : Fin m × Fin m => p (lk.1.val + 1) lk.2) ∧ |
| ∀ l k : Fin m, m ^ 3 < p (l.val + 1) k ∧ p (l.val + 1) k ≤ m ^ 5 |
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| abbrev MaskTag (h : ℕ) (p : ℕ → ℕ → ℕ) (l : ℕ) := Σ k : Fin h, Fin (p l k) |
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| def maskTags (h : ℕ) (p : ℕ → ℕ → ℕ) (l : ℕ) : List (MaskTag h p l) := |
| (List.ofFn fun k : Fin h => List.ofFn fun b : Fin (p l k) => Sigma.mk k b).flatten |
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| def MaskAlphabet (h : ℕ) (p : ℕ → ℕ → ℕ) : ℕ → Type |
| | 0 => Bool |
| | l + 1 => MaskTag h p (l + 1) × MaskAlphabet h p l |
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| instance maskAlphabetFintype (h : ℕ) (p : ℕ → ℕ → ℕ) (l : ℕ) : |
| Fintype (MaskAlphabet h p l) := by |
| induction l with |
| | zero => exact inferInstanceAs (Fintype Bool) |
| | succ l ih => exact @instFintypeProd _ _ inferInstance ih |
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| def MaskState (h : ℕ) (p : ℕ → ℕ → ℕ) (M : ℕ) : ℕ → Type |
| | 0 => ZMod M |
| | l + 1 => MaskTag h p (l + 1) → MaskState h p M l |
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| def shiftMaskState (h : ℕ) (p : ℕ → ℕ → ℕ) (M : ℕ) : |
| (l : ℕ) → MaskState h p M l → ZMod M → MaskState h p M l |
| | 0, v, θ => (show ZMod M from v) + θ |
| | l + 1, v, θ => fun j => shiftMaskState h p M l (v j) θ |
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| def maskGamma (h : ℕ) (p : ℕ → ℕ → ℕ) (M l a : ℕ) |
| (j : MaskTag h p l) : ZMod M := |
| (∑ k : Fin h, ((M / p l k * (a % p l k) : ℕ) : ZMod M)) + |
| ((j.2.val * (M / p l j.1) * (a % p l j.1) : ℕ) : ZMod M) |
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| def maskWord (h : ℕ) (p : ℕ → ℕ → ℕ) (R M : ℕ) : |
| (l : ℕ) → MaskState h p M l → List (MaskAlphabet h p l) |
| | 0, v => (List.range M).map (fun b => decide (((b : ZMod M) - (show ZMod M from v)).val < M / 2)) |
| | l + 1, v => (List.range (R * period h p (l + 1))).flatMap fun a => |
| (maskTags h p (l + 1)).flatMap fun j => |
| (maskWord h p R M l |
| (shiftMaskState h p M l (v j) (maskGamma h p M (l + 1) a j))).map |
| (fun x => (j, x)) |
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| def ExcludedAlphabet (m L : ℕ) : ℕ → Type |
| | 0 => Fin L × Bool |
| | l + 1 => Fin m × ExcludedAlphabet m L l |
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| instance excludedAlphabetFintype (m L l : ℕ) : Fintype (ExcludedAlphabet m L l) := by |
| induction l with |
| | zero => exact inferInstanceAs (Fintype (Fin L × Bool)) |
| | succ l ih => exact @instFintypeProd _ _ inferInstance ih |
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| def ExcludedState (m L : ℕ) : ℕ → Type |
| | 0 => ZMod L |
| | l + 1 => Fin m → ExcludedState m L l |
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| def shiftExcludedState (m L : ℕ) : |
| (l : ℕ) → ExcludedState m L l → ZMod L → ExcludedState m L l |
| | 0, v, θ => (show ZMod L from v) + θ |
| | l + 1, v, θ => fun i => shiftExcludedState m L l (v i) θ |
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| def excludedTranslation (m : ℕ) (p : ℕ → ℕ → ℕ) (L l s : ℕ) (i : Fin m) : |
| ZMod L := ∑ j ∈ Finset.univ.erase i, ((L / p l j * (s % p l j) : ℕ) : ZMod L) |
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| def excludedWord (m : ℕ) (p : ℕ → ℕ → ℕ) (R L : ℕ) : |
| (l : ℕ) → ExcludedState m L l → List (ExcludedAlphabet m L l) |
| | 0, v => List.ofFn fun b : Fin L => |
| (b, decide (((b.val : ZMod L) - (show ZMod L from v)).val < L / 2)) |
| | l + 1, v => (List.range (R * period m p (l + 1))).flatMap fun s => |
| (List.ofFn fun i : Fin m => |
| (excludedWord m p R L l |
| (shiftExcludedState m L l (v i) (excludedTranslation m p L (l + 1) s i))).map |
| (fun x => (i, x))).flatten |
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| def MaskWitness (a C δ lower : ℝ) (d : ℕ) : Prop := |
| ∃ h : ℕ, 2 ≤ h ∧ ∃ p : ℕ → ℕ → ℕ, MaskPrimes h p ∧ |
| ∃ (w : ℕ) (c : MaskAlphabet h p h → Fin w → Bool), |
| SubstitutionBounds a C c ∧ OffsetLocal δ c ∧ |
| ∃ n : ℕ, 0 < n ∧ n ≤ d ∧ |
| (∀ v : MaskState h p (circleSize h p) h, |
| (encode c (maskWord h p (h ^ (2 * h)) (circleSize h p) h v)).length = n) ∧ |
| Real.exp (lower * exponentScale d) ≤ setDistortion |
| (Set.range fun v : MaskState h p (circleSize h p) h => |
| encode c (maskWord h p (h ^ (2 * h)) (circleSize h p) h v)) |
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| def ExcludedWitness (a C ε lower : ℝ) (d : ℕ) : Prop := |
| ∃ m : ℕ, 2 ≤ m ∧ ∃ p : ℕ → ℕ → ℕ, ExcludedPrimes m p ∧ |
| ∃ (w : ℕ) (c : ExcludedAlphabet m (circleSize m p) m → Fin w → Bool), |
| SubstitutionBounds a C c ∧ AnchorLocal ε c ∧ |
| ∃ n : ℕ, 0 < n ∧ n ≤ d ∧ |
| (∀ v : ExcludedState m (circleSize m p) m, |
| (encode c (excludedWord m p (m ^ (2 * m)) (circleSize m p) m v)).length = n) ∧ |
| Real.exp (lower * exponentScale d) ≤ setDistortion |
| (Set.range fun v : ExcludedState m (circleSize m p) m => |
| encode c (excludedWord m p (m ^ (2 * m)) (circleSize m p) m v)) |
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| def UniformUpper (C : ℝ) (d₀ : ℕ) : Prop := |
| ∀ (α : Type) [Fintype α], 2 ≤ Fintype.card α → ∀ d : ℕ, d₀ ≤ d → |
| ∃ (M : ℕ) (F : Words α d → Fin M → ℝ), ∀ x y : Words α d, |
| (editDistance x.val y.val : ℝ) ≤ ∑ i, |F x i - F y i| ∧ |
| (∑ i, |F x i - F y i|) ≤ |
| Real.exp (C * exponentScale d) * editDistance x.val y.val |
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| def FullMain : Prop := |
| ∃ c C a Ccode δ ε : ℝ, ∃ d₀ : ℕ, |
| 0 < c ∧ 0 < C ∧ 0 < a ∧ 0 < Ccode ∧ 0 < δ ∧ 0 < ε ∧ |
| TwoCodes a Ccode δ ε ∧ UniformUpper C d₀ ∧ |
| (∀ (α : Type) [Fintype α], 2 ≤ Fintype.card α → ∀ d : ℕ, d₀ ≤ d → |
| Real.exp (c * exponentScale d) ≤ E α d ∧ |
| E α d ≤ Real.exp (C * exponentScale d)) ∧ |
| (∀ d : ℕ, d₀ ≤ d → |
| MaskWitness a Ccode δ c d ∧ ExcludedWitness a Ccode ε c d ∧ |
| Real.exp (c * exponentScale d) ≤ alphabetSupremum d ∧ |
| alphabetSupremum d ≤ Real.exp (C * exponentScale d)) |
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| noncomputable def unequalDeficit {α : Type u} (x y : List α) : ℕ := |
| max x.length y.length - lcs x y |
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| end FiniteCircle |
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| end OAI |
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