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theorem proved term proof

cube_face_equicardinal

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formal statement (Lean)

  69theorem cube_face_equicardinal
  70    {A B : Type} [Fintype A] [Fintype B]
  71    (hA : HasCubeFaceCount A) (hB : HasCubeFaceCount B) :
  72    Fintype.card A = Fintype.card B := by

proof body

Term-mode proof.

  73  rw [hA, hB]
  74
  75/-- Standard Model total fermion count: 6 quarks + 6 leptons = 12. -/

depends on (7)

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