OAI/GroupTheory/FiniteIndex/Characteristic.lean

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5 declarations, 0 contain sorry, 0 declared as axioms

Characteristic finite-index refinement by kernels of finite quotients.

  1. lemma OAI.FiniteIndexRealization.finite_hom_of_fg line 9
  2. def OAI.FiniteIndexRealization.universalKernel line 20
  3. lemma OAI.FiniteIndexRealization.universalKernel_characteristic line 23
  4. lemma OAI.FiniteIndexRealization.universalKernel_finiteIndex line 32
  5. theorem OAI.FiniteIndexRealization.characteristic_finiteIndex_refinement line 37