
theorem Th20:
  for S being one-gate ManySortedSign for A being one-gate Circuit
  of S for s being State of A holds Result s = Following s
proof
  let S be one-gate ManySortedSign;
  let A be one-gate Circuit of S;
  let s be State of A;
A1: Following s = Following(s,1) by FACIRC_1:14;
  s is stabilizing & Following s is stable by Def2,Th19;
  hence thesis by A1,Def4;
end;
