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def definition def or abbrev

discreteLocalConfigSpace

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formal statement (Lean)

 100def discreteLocalConfigSpace (C : Type*) [Nonempty C] : LocalConfigSpace C where
 101  nonempty := inferInstance

proof body

Definition body.

 102  N := fun c => {U : Set C | c ∈ U}
 103  mem_of_mem_N := fun c U hU => hU
 104  N_nonempty := fun c => ⟨Set.univ, mem_univ c⟩
 105  intersection_closed := fun c U V hU hV => ⟨U ∩ V, ⟨hU, hV⟩, Subset.rfl⟩
 106  refinement := fun c U c' hU hc' => ⟨U, hc', Subset.rfl⟩
 107
 108/-! ## Trivial Configuration Space -/
 109
 110/-- A trivial configuration space where only the whole space is a neighborhood.
 111    This is the "maximally coarse" locality structure. -/

depends on (16)

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