reserve x for set;
reserve i,j for Integer;
reserve n,n1,n2,n3 for Nat;
reserve K,K1,K2,K3 for Field;
reserve SK1,SK2 for Subfield of K;
reserve ek,ek1,ek2 for Element of K;
reserve p for Prime;
reserve a,b,c for Element of GF(p);
reserve F for FinSequence of GF(p);

theorem Th40:
  ProjCo(GF(p)) = [:the carrier of GF(p),
  the carrier of GF(p), the carrier of GF(p):] \ {[0,0,0]}
  proof
    0.GF(p) = 0 by Th11;
    hence thesis;
  end;
