OAI/GroupTheory/PolycyclicRecognition/Algebra/FreeCoefficientCoinvariants.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

Coinvariant tensor with a free coefficient representation

This functor is a finite-support sum of the underlying module functor, so it preserves homology. The comparison keeps the actual group-ring action.

  1. theorem OAI.PolycyclicRecognition.tensorFreeToFinsupp_natural line 22
  2. def OAI.PolycyclicRecognition.freeCoefficientCoinvariantsIso line 51