2024-05-15 09:43
Mathlib/Algebra/Lie/Weights/Killing.lean
feat: Cartan subalgebras contain only semisimple elements if the Killing form is non-singular and the coefficients are a perfect field. (#12712) …
Added LieAlgebra.IsKilling.isSemisimple_ad_of_mem_isCartanSubalgebra