let T be InsType of the InstructionsF of SCM; :: thesis: ( T = 0 implies JumpParts T = {0} )
assume A1: T = 0 ; :: thesis: JumpParts T = {0}

hereby :: according to TARSKI:def 3,XBOOLE_0:def 10 :: thesis: {0} c= JumpParts T

let a be object ; :: thesis: ( a in JumpParts T implies a in {0} )
assume a in JumpParts T ; :: thesis: a in {0}
then consider I being Instruction of SCM such that
A2: a = JumpPart I and
A3: InsCode I = T ;
I = halt SCM by A1, A3, AMI_5:7;
hence a in {0} by A2, TARSKI:def 1; :: thesis: verum

end;

let a be object ; :: according to TARSKI:def 3 :: thesis: ( not a in {0} or a in JumpParts T )
assume a in {0} ; :: thesis: a in JumpParts T
then A4: a = 0 by TARSKI:def 1;
InsCode (halt SCM) = 0 ;
hence a in JumpParts T by A1, Th2, A4; :: thesis: verum