theorem
 for n being Element of NAT holds
  not n-thRWNotIn L in L
proof let n be Element of NAT;
  set FNI = n-thRWNotIn L;
  set sn = (RWNotIn-seq L).n;
  min sn in sn by XXREAL_2:def 7;
  hence thesis by Th22;
end;
