theorem
   for R be comRing,M be LeftMod of R holds
   M ~= AbGrLMod(AbGr(M),canHom(M))
   proof
     let R be comRing, M be LeftMod of R;
A1:  rho(M) is Homomorphism of R,M,AbGrLMod(AbGr(M),canHom(M)) by Def10;
     rho(M) is one-to-one onto by Th38;
     hence thesis by A1;
   end;
