For u ∉ Q̄ with uū algebraic, each space Q̄ + Q̄u + Q̄ū + Q̄w with w = u², ū² or 1/(u − a), a ∈ Q̄ non-zero, carries a 2×3 configuration

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For u ∉ Q̄ with uū algebraic, each space Q̄ + Q̄u + Q̄ū + Q̄w with w = u², ū² or 1/(u − a), a ∈ Q̄ non-zero, carries a 2×3 configuration · Prove2Me