For u ∉ Q̄ with uū algebraic and any involution pencil, the space carries a 2×3 configuration while no Q̄ + Q̄u + Q̄ū + Q̄w inside it does

Initializing...

For u ∉ Q̄ with uū algebraic and any involution pencil, the space carries a 2×3 configuration while no Q̄ + Q̄u + Q̄ū + Q̄w inside it does · Prove2Me