Explicit real support fans for the handwritten geometric point set. The polynomial decompositions are proved by ring; their signs by positivity. Each cone carries one fixed triple on both endpoints. No Boolean checker is used.

noncomputable def ConwaySoifer.Simplified.threeCentralPoint (s : ℝ) : Fin 6 → Point

The six-point configuration used by the central three-witness obstruction.

Equations

• One or more equations did not get rendered due to their size.

theorem ConwaySoifer.Simplified.threeCentral_obstruction {Q : EquilateralTriangle} {s : ℝ} (hs0 : 0 < s) (hs : s ≤ 1 / 10) (hq : 0 < Q.side) (hpts : ∀ (i : Fin 6), threeCentralPoint s i ∈ Q.carrier) : 1 ≤ Q.side