theorem
proved
term proof
localResolution_covers
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formal statement (Lean)
119theorem localResolution_covers (U : Set C) :
120 ⋃₀ LocalResolution r U = U := by
proof body
Term-mode proof.
121 ext c
122 simp only [Set.mem_sUnion, LocalResolution, Set.mem_setOf_eq]
123 constructor
124 · intro ⟨S, ⟨c', hc'U, hS⟩, hcS⟩
125 rw [hS] at hcS
126 exact hcS.1
127 · intro hcU
128 refine ⟨U ∩ ResolutionCell r c, ⟨c, hcU, rfl⟩, ?_⟩
129 exact ⟨hcU, mem_resolutionCell_self r c⟩
130
131/-! ## Distinguishability -/
132
133/-- Two configurations are distinguishable if they produce different events -/