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. -/