For u ∉ Q̄ and the pencil of any Möbius involution, the space Q̄ + Q̄u + Q̄u⁻¹ + Σ Q̄ q₁(u)ⁱq₂(u)³⁻ⁱ/(u l₁(u)l₂(u)) carries a 2×3 configuration

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For u ∉ Q̄ and the pencil of any Möbius involution, the space Q̄ + Q̄u + Q̄u⁻¹ + Σ Q̄ q₁(u)ⁱq₂(u)³⁻ⁱ/(u l₁(u)l₂(u)) carries a 2×3 configuration · Prove2Me