Theorems · Theorem · nonassociative algebras

LieAlgebra.IsKilling.orthogonal_span_coroot_eq_ker

∀ {K : Type u_2} {L : Type u_3} [inst : LieRing L] [inst_1 : Field K] [inst_2 : LieAlgebra K L]
  [inst_3 : FiniteDimensional K L] {H : LieSubalgebra K L} [inst_4 : H.IsCartanSubalgebra]
  [inst_5 : LieAlgebra.IsKilling K L] [LieModule.IsTriangularizable K (↥H) L] [inst_7 : CharZero K]
  (α : LieModule.Weight K (↥H) L),
  (LieModule.traceForm K (↥H) L).orthogonal (K ∙ LieAlgebra.IsKilling.coroot α) = LieModule.Weight.ker

Defined in

Mathlib.Algebra.Lie.Weights.Killing

Cited by

2 results in Mathlib

Foundations

Depth 192 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

LieRingFieldLieAlgebraFiniteDimensionalLieSubalgebra.IsCartanSubalgebraLieAlgebra.IsKillingLieModule.IsTriangularizableCharZero