2024-11-20 20:34
Mathlib/LinearAlgebra/RootSystem/Finite/Nondegenerate.lean
feat (LinearAlgebra/RootSystem/Finite): nondegeneracy of canonical bilinear form restricted to root span (#18569) …
Added RootPairing.eq_zero_of_mem_rootSpan_of_rootForm_self_eq_zero