
theorem Th2:
  for X be RealNormSpace for seq be sequence of X
   for m be Nat holds 0 <= ||.seq.||.m
proof
  let X be RealNormSpace;
  let seq be sequence of X;
  let m be Nat;
  ||.seq.||.m = ||.seq.m.|| by NORMSP_0:def 4;
  hence thesis;
end;
