def
definition
def or abbrev
identity
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formal statement (Lean)
105def identity (V : VantageCategory) : VantageFunctor V V := {
proof body
Definition body.
106 map_state := id,
107 map_trans := id,
108 map_id := fun _ => rfl,
109 preserves_strain := fun _ => rfl
110}
111
112end VantageFunctor
113
114/-! ## Vantage Equivalence -/
115
116/-- An equivalence between vantage categories.
117
118Two vantages are equivalent if there exist mutually inverse functors
119that both preserve strain.
120-/
used by (40)
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