OAI/GroupTheory/PolycyclicRecognition/Geometry/HeightKernelVirtualSolvable.lean

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Virtual solvability for the full locally virtually nilpotent height kernel

The rational dimension and torsion bounds come from the actual FP-infinity coefficient argument. A characteristic soluble subgroup permits passage from the kernel to the ambient extension.

  1. theorem OAI.PolycyclicRecognition.TypeFPInfinity.heightKernel_virtualSolvable line 19