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jstoobysmith 2024-07-09 19:22:16 -04:00
parent b5a22f9685
commit f83908e259
9 changed files with 13 additions and 23 deletions
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HepLean/AnomalyCancellation/PureU1/Permutations.lean
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@ -106,7 +106,8 @@ lemma FamilyPermutations_anomalyFreeLinear_apply (S : (PureU1 n).LinSols)
((FamilyPermutations n).linSolRep f S).val i = S.val (f.invFun i) := by
rfl
/-- The permutation which swaps i and j. TODO: Replace with: `Equiv.swap`. -/
/-! TODO: Replace the definition of `pairSwap` with `Equiv.swap`. -/
/-- The permutation which swaps i and j. -/
def pairSwap {n : ℕ} (i j : Fin n) : (FamilyPermutations n).group where
toFun s :=
if s = i then