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feat: Add DropPair ProdP commutation lemma for one orientation #1345

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feat: Add DropPair ProdP commutation lemma for one orientation #1345

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ebf4ba4
feat: Add DropPair ProdP commutation lemma for one orientation
NicolaBernini Jul 1, 2026
02d05ae
fix: Trying to Fix the Build
NicolaBernini Jul 1, 2026
0ef48e9
fix: Trying to Fix
NicolaBernini Jul 1, 2026
3d805ad
fix: avoid ambiguous succSuccAbove cast simplification
NicolaBernini Jul 1, 2026
04c763c
fix: make succSuccAbove cast lengths explicit
NicolaBernini Jul 3, 2026
e3d3abd
fix: require distinct indices for castAdd drop-pair lemmas
NicolaBernini Jul 3, 2026
d22d471
fix: make append castAdd reindexing use identity
NicolaBernini Jul 3, 2026
30cf76f
fix: drop fragile left-factor dropPair commutation
NicolaBernini Jul 3, 2026
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2 changes: 0 additions & 2 deletions Physlib/Relativity/Tensors/Contraction/Pure.lean
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Expand Up @@ -118,8 +118,6 @@ lemma dropPair_update_succSuccAbove {n : ℕ} [inst : DecidableEq (Fin (n + 1 +1
· simp [h]
· simp [h]

TODO "Prove lemmas relating to the commutation rules of `dropPair` and `prodP`."

@[simp]
lemma dropPair_permP {n n1 : ℕ} {c : Fin (n + 1 + 1) → C}
{c1 : Fin (n1 + 1 + 1) → C} (i j : Fin (n1 + 1 + 1)) (hij : i ≠ j)
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