OAI/GroupTheory/PolycyclicRecognition/Algebra/QuotientTrace.lean

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Trace after removing a nilpotent quotient action

The Cartan ideal has the same adjoint trace as the ambient algebra because the quotient action comes from the nilpotent Cartan algebra. This is the finite-dimensional linear step of that argument.

  1. theorem OAI.PolycyclicRecognition.trace_eq_restrict_of_nilpotent_quotient line 21