For the same u and any involution pencil, the space contains none of u², u⁻² and 1/(u − b) with b ∈ Q̄ non-zero

Initializing...

For the same u and any involution pencil, the space contains none of u², u⁻² and 1/(u − b) with b ∈ Q̄ non-zero · Prove2Me