Theorem RootPairing.pairingIn_pairingIn_mem_set_of_isCrystallographic_of_isReduced
Modification history
2025-04-07 18:17
Mathlib/LinearAlgebra/RootSystem/Finite/Lemmas.lean
feat: a finite crystallographic reduced irreducible root pairing containing two roots with Coxeter weight three is spanned by this pair (#23634)
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