theorem
  <NAT,*,1> = multLoopStr(#NAT,multnat,1#)
proof
  set N = <NAT,*,1>;
  the multMagma of N = <NAT,*> & the_unity_wrt op(N) = un(N) by Def22,Th17;
  hence thesis by Def31,Th54;
end;
