OAI/GroupTheory/PolycyclicRecognition/Lattices/SemisimpleCentralizerCorrection.lean

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Correcting an outer centralizer into a semisimple centralizer

When conjugation by B changes A only by an inner automorphism, B can itself be corrected by an inner automorphism to centralize the semisimple part of A.

  1. theorem OAI.PolycyclicRecognition.semisimple_centralizer_inner_correction line 16