 reserve x,y,X,Y for set;
reserve G for non empty multMagma,
  D for set,
  a,b,c,r,l for Element of G;
reserve M for non empty multLoopStr;
reserve H for non empty SubStr of G,
  N for non empty MonoidalSubStr of G;

theorem Th54:
  the_unity_wrt the multF of <NAT,*> = 1
proof
  carr(<NAT,*>) = NAT by Def31;
  hence thesis by Th30,BINOP_2:7;
end;
