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Theorems · Theorem · nonassociative algebras

RootPairing.coroot_eq_polarizationEquiv_apply_root

∀ {ι : Type u_1} {R : Type u_2} {M : Type u_3} {N : Type u_4} [inst : Fintype ι] [inst_1 : AddCommGroup M]
  [inst_2 : AddCommGroup N] [inst_3 : Field R] [inst_4 : Module R M] [inst_5 : Module R N] (P : RootPairing ι R M N)
  [inst_6 : P.IsAnisotropic] [inst_7 : P.IsRootSystem] (i : ι),
  P.coroot i = (2 / (P.RootForm (P.root i)) (P.root i)) • P.PolarizationEquiv (P.root i)
Defined in
Mathlib.LinearAlgebra.RootSystem.Finite.Nondegenerate
Cited by
2 results in Mathlib
Foundations
Depth 130 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
FintypeAddCommGroupAddCommGroupFieldModuleModuleRootPairing.IsAnisotropicRootPairing.IsRootSystem

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