reserve x,y,z for set,
  k for Nat;
reserve J,J1,K for Element of Segm 13,
  a for Nat,
  b,b1,b2,c,c1,c2 for Element of SCM+FSA-Data-Loc,
  f,f1,f2 for Element of SCM+FSA-Data*-Loc;

theorem Th2:
  NAT in SCM+FSA-Memory
proof
  NAT in {NAT} by TARSKI:def 1;
  then NAT in {NAT} \/ SCM-Data-Loc by XBOOLE_0:def 3;
  then NAT in SCM-Memory;
  hence thesis by XBOOLE_0:def 3;
end;
