OAI/GroupTheory/PolycyclicRecognition/Algebra/AlgebraicConjugationCharacters.lean

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Algebraic conjugation characters are roots of unity

The word count bounds every complex embedding of the eigenvalue. Kronecker's theorem then applies to an integral eigenvalue in a number field.

  1. theorem OAI.PolycyclicRecognition.polynomial_growth_algebraic_conjugation_character_torsion line 16