reserve x,y for set;
reserve D for non empty set;
reserve UN for Universe;
reserve f for RingMorphismStr;
reserve G,H,G1,G2,G3,G4 for Ring;
reserve F for RingMorphism;
reserve V for Ring_DOMAIN;

theorem Th16:
  ex x being object st x in UN & GO x,Z_3
proof
  set G = Z_3;
  reconsider x1 = the carrier of G, x2 = the addF of G, x3 = comp G, x4 = 0.G,
  x5 = the multF of G, x6 = 1.G as Element of UN by MOD_2:29;
  set x9 = [x1,x2,x3,x4];
  set x = [x9,x5,x6];
  take x;
  x9 is Element of UN by GRCAT_1:1;
  hence thesis by GRCAT_1:1;
end;
