OAI/Analysis/CircleDomains/Sobolev/LipschitzScalarCoarea.lean

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Exact weighted scalar coarea for a planar Lipschitz function. Regular pieces, zero-derivative pieces, and the Rademacher null set are all included.

  1. lemma OAI.CircleDomainRigidity.weighted_coarea_of_zero_fibers line 14
  2. lemma OAI.CircleDomainRigidity.lipschitz_scalar_weighted_coarea line 26