ext

formal source

  48  · intro h
  49    exact ⟨h _ (Or.inl rfl), h _ (Or.inr (Or.inl rfl)), h _ (Or.inr (Or.inr rfl))⟩
  50
  51@[ext] theorem ext {a b : LeptonMassRatios}
  52    (h1 : a.mu_over_e = b.mu_over_e)
  53    (h2 : a.tau_over_e = b.tau_over_e)
  54    (h3 : a.tau_over_mu = b.tau_over_mu) : a = b := by
  55  cases a; cases b; simp_all
  56
  57theorem toList_injective {a b : LeptonMassRatios} (h : a.toList = b.toList) : a = b := by
  58  simp only [toList] at h
  59  have h1 : a.mu_over_e = b.mu_over_e := List.cons.inj h |>.1
  60  have h23 := List.cons.inj h |>.2
  61  have h2 : a.tau_over_e = b.tau_over_e := List.cons.inj h23 |>.1
  62  have h3 : a.tau_over_mu = b.tau_over_mu := List.cons.inj (List.cons.inj h23 |>.2) |>.1
  63  exact ext h1 h2 h3
  64
  65@[simp] theorem mk_toList (a b c : ℝ) :
  66    (⟨a, b, c⟩ : LeptonMassRatios).toList = [a, b, c] := rfl
  67
  68end LeptonMassRatios
  69
  70namespace CkmMixingAngles
  71
  72/-- Canonical list view: `[V_us, V_cb, V_ub]`. -/
  73def toList (m : CkmMixingAngles) : List ℝ :=
  74  [m.vus, m.vcb, m.vub]
  75
  76@[simp] theorem toList_length (m : CkmMixingAngles) : m.toList.length = 3 := rfl
  77
  78/-- Every field satisfies a predicate. -/
  79def Forall (P : ℝ → Prop) (m : CkmMixingAngles) : Prop :=
  80  P m.vus ∧ P m.vcb ∧ P m.vub
  81