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inductive definition def or abbrev

Generation

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formal statement (Lean)

  47inductive Generation : Type
  48  | first | second | third
  49  deriving DecidableEq, Repr, Inhabited
  50
  51/-- Canonical generation torsion from Q₃ cube geometry.
  52
  53- Gen 1 (ground state): τ = 0
  54- Gen 2 (passive-edge mode): τ = passive_field_edges(D) = 11
  55- Gen 3 (passive-edge + face mode): τ = passive_field_edges(D) + cube_faces(D) = 17
  56
  57No raw numerals: every branch is a cube-combinatorial function of D=3.
  58-/

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