OAI/GroupTheory/PolycyclicRecognition/Algebra/NilpotentChartCountability.lean

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Countability and Haar measure on the chosen nilpotent factors

  1. theorem OAI.PolycyclicRecognition.NilpotentLieModel.secondCountable_of_chart line 17

    Source documentation

    The actual exponential chart transports the countable topology of a finite-dimensional real vector space to the selected factor.

    theorem secondCountable_of_chart
        (chart : GroupLieAlgebra (𝓘(ℝ, N.modelSpace)) N.carrier ≃ₜ N.carrier) :
        SecondCountableTopology N.carrier := by
    …