
theorem BlaBla2:
  for f be heterogeneous positive non empty real-valued FinSequence,
      i,j being object st
    i in MeanLess f & j in MeanMore f holds
   i in dom f & j in dom f & i <> j & f.i < Mean f & f.j > Mean f
  proof
    let f be heterogeneous positive non empty real-valued FinSequence;
    let i,j be object;
    assume
A1: i in MeanLess f & j in MeanMore f; then
    consider ii being Nat such that
A2: ii = i & ii in dom f & f.ii < Mean f;
    consider jj being Nat such that
A3: jj = j & jj in dom f & f.jj > Mean f by A1;
    thus thesis by A2,A3;
  end;
