theorem Th37:
  for f being Assign of BASSModel(R,BASSIGN), G1,G2 being Subset of
S holds G1 c= G2 implies SigFaxTau(f,G1,R,BASSIGN) c= SigFaxTau(f,G2,R,BASSIGN)
proof
  let f be Assign of BASSModel(R,BASSIGN);
  let G1,G2 be Subset of S;
  assume G1 c= G2;
  then
  for s being Element of S holds s|= Tau(G1,R,BASSIGN) implies s|= Tau(G2,
  R,BASSIGN) by Th34;
  then
  for s being Element of S holds s|= Fax(f,Tau(G1,R,BASSIGN)) implies s|=
  Fax(f,Tau(G2,R,BASSIGN)) by Th36;
  hence thesis by Th35;
end;
