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jstoobysmith 2024-10-21 09:44:56 +00:00
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HepLean/Tensors/Tree/Basic.lean
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@ -36,6 +36,7 @@ structure TensorStruct where
FDiscrete : Discrete C ⥤ Rep k G
/-- A map from `C` to `C`. An involution. -/
τ : C → C
/-- The condition that `τ` is an involution. -/
τ_involution : Function.Involutive τ
/-- The natural transformation describing contraction. -/
contr : OverColor.Discrete.pairτ FDiscrete τ ⟶ 𝟙_ (Discrete C ⥤ Rep k G)