reserve D for non empty set,
  D1,D2,x,y for set,
  n,k for Nat,
  p,x1 ,r for Real,
  f for Function;
reserve F for Functional_Sequence of D1,D2;
reserve G,H,H1,H2,J for Functional_Sequence of D,REAL;

theorem
  abs(G/H) = abs(G) / abs(H)
proof
  thus abs(G/H)=abs(G)(#)abs((H")) by Th15
    .=abs(G)/abs(H) by Th14;
end;
