theorem
  T = 0 implies JumpParts T = {0}
proof
  assume
A1: T = 0;
  hereby
    let a be object;
    assume a in JumpParts T;
    then consider I such that
A2: a = JumpPart I and
A3: InsCode I = T;
    I = halt SCM+FSA by A1,A3,SCMFSA_2:95;
    hence a in {0} by A2,TARSKI:def 1;
  end;
  let a be object;
  assume a in {0};
  then
A4: a = 0 by TARSKI:def 1;
   InsCode halt SCM+FSA = 0;
  hence thesis by A1,Th9,A4;
end;
