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structure definition def or abbrev

SemiconductorCert

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formal statement (Lean)

  39structure SemiconductorCert where
  40  five_types : Fintype.card SemiconductorType = 5
  41  phi_ratio : ∀ k, bandGap (k + 1) / bandGap k = phi
  42  bandGap_always_pos : ∀ k, 0 < bandGap k
  43

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