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feat: Make MulActionTensor

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jstoobysmith 2024-07-30 07:51:07 -04:00
parent 99f4e85839
commit a65fb06605
11 changed files with 177 additions and 55 deletions
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2
HepLean/SpaceTime/LorentzVector/Basic.lean
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@ -86,7 +86,7 @@ lemma decomp_stdBasis (v : LorentzVector d) : ∑ i, v i • e i = v := by
@[simp]
lemma decomp_stdBasis' (v : LorentzVector d) :
v (Sum.inl 0) • e (Sum.inl 0) + ∑ a₂ : Fin d, v (Sum.inr a₂) • e (Sum.inr a₂) = v := by
v (Sum.inl 0) • e (Sum.inl 0) + ∑ a₂ : Fin d, v (Sum.inr a₂) • e (Sum.inr a₂) = v := by
trans ∑ i, v i • e i
simp only [Fin.isValue, Fintype.sum_sum_type, Finset.univ_unique, Fin.default_eq_zero,
Finset.sum_singleton]