reserve D,D9 for non empty set;
reserve R for Ring;
reserve G,H,S for non empty ModuleStr over R;
reserve UN for Universe;
reserve R for Ring;
reserve G, H for LeftMod of R;
reserve G1, G2, G3 for LeftMod of R;
reserve f for LModMorphismStr over R;
reserve a,b,c for Element of {0,1,2};

theorem Th22:
  0.Z_3 = 0 & 1.Z_3 = 1 & 0.Z_3 is Element of {0,1,2} & 1.Z_3 is
  Element of {0,1,2} & the addF of Z_3 = add3 & the multF of Z_3 = mult3;
