Spine tetrahedron
v91_spine_tetrahedron.py · registry
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Spine tetrahedron {2,3,4,5} = {e₃(a), p₀(a), e₁(a), e₂(a)}: edges {6,8,10,12,15,20}, faces {24,30,40,60}, volume 120 = |R⁺(E₈)| = 5!; 240 = |μ₄|·|E(K₄)|·|E(K₅)| with K₆ negative control; dual cuts typed as tautological presentation; sub-grammar honestly incomplete (7,16,41,48,240,248 outside)
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