OAI/GroupTheory/FiniteIndex/Realization.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

Realization of finite-index subgroups in extensions with free abelian quotient.

  1. lemma OAI.FiniteIndexRealization.normal_map_of_characteristic line 9
  2. theorem OAI.FiniteIndexRealization.realize_finite_index line 23