reserve A for non empty set,
  a,b,x,y,z,t for Element of A,
  f,g,h for Permutation of A;
reserve R for Relation of [:A,A:];
reserve AS for non empty AffinStruct;
reserve a,b,x,y for Element of AS;
reserve CS for CongrSpace;

theorem Th24:
  for f being Permutation of the carrier of CS st f is_DIL_of CS
  holds f" is_DIL_of CS
by Lm4,Th13;
