
theorem Th26:
  for n being Ordinal holds GrInvLexOrder n is admissible
proof
  let n be Ordinal;
A1: for a,b,c being bag of n st [a,b] in InvLexOrder n
  holds [a+c,b+c] in InvLexOrder n by Def5;
  InvLexOrder n is_strongly_connected_in Bags n by Def5;
  hence thesis by A1,Th23;
end;
