OAI/GroupTheory/PolycyclicRecognition/Geometry/RepresentationKernelAdjoint.lean

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A faithful Lie representation detects the adjoint action of its group kernel

  1. theorem OAI.PolycyclicRecognition.adjointLinearMap_eq_id_of_representation_kernel line 18
  2. theorem OAI.PolycyclicRecognition.lieHom_adjoint_of_exponential_intertwining line 51

    Source documentation

    Exponential compatibility also intertwines the full adjoint action.

    theorem lieHom_adjoint_of_exponential_intertwining
        {Exp : GroupLieAlgebra (๐“˜(โ„, E)) G โ†’ G} (hExp : IsGroupExponential Exp)
        (j : GroupLieAlgebra (๐“˜(โ„, E)) G โ†’โ‚—โ…โ„โ† A)
        (ฯ : G โ†’* Aหฃ) (he : โˆ€ x, ฯ (Exp x) = algebraExpUnit (j x))
        (g : G) (x : GroupLieAlgebra (๐“˜(โ„, E)) G) :
        j (adjointLinearMap (E := E) g x) = (ฯ g : A) * j x * (ฯ g)โปยน := by
    โ€ฆ

    Mentions: OAI.PolycyclicRecognition.algebraExpUnit, OAI.PolycyclicRecognition.adjointLinearMap