reserve a,b,c,d,m,x,n,j,k,l for Nat,
  t,u,v,z for Integer,
  f,F for FinSequence of NAT;
reserve p,q,r,s for real number;
reserve a,b,c,d,m,x,n,k,l for Nat,
  t,z for Integer,
  f,F,G for FinSequence of REAL;
reserve q,r,s for real number;
reserve D for set;

theorem Th14:
  Sum(f^F) = Sum(f) + Sum(F)
  proof
    f is FinSequence of COMPLEX & F is FinSequence of COMPLEX by RVSUM_1:146;
    hence thesis by MATRIXC1:46;
  end;
