reserve m for Cardinal,
  A,B,C for Ordinal,
  x,y,z,X,Y,Z,W for set,
  f for Function;
reserve f,g for Function,
  L for Sequence,
  F for Cardinal-Function;

theorem
  W is epsilon-transitive implies Rank card Tarski-Class W = Tarski-Class W
proof
  assume W is epsilon-transitive;
  then Rank card Tarski-Class W is_Tarski-Class_of W by Th44;
  hence Rank card Tarski-Class W c= Tarski-Class W & Tarski-Class W c= Rank
  card Tarski-Class W by Th28,CLASSES1:def 4;
end;
