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theorem proved term proof

lepton_total_span

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formal statement (Lean)

 137theorem lepton_total_span :
 138    lepton_step_12 + lepton_step_23 = wallpaper_groups := by native_decide

proof body

Term-mode proof.

 139
 140/-!
 141### Down-Quark Sector (coupling dimension d=2, faces)
 142
 143Down quarks traverse DOWN from faces to vertices.
 144Gen 1→2 step: F = 6 (face count = coupling dimension count)
 145Gen 2→3 step: V = 8 (vertex count = complementary dimension)
 146Total span: V + F = 14 = W - D
 147-/
 148
 149/-- Down-quark generation steps from cube geometry. -/

depends on (20)

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