let i, j be Element of SCM+FSA-Instr ; :: according to COMPOS_0:def 5 :: thesis:
assume A1: InsCode i = InsCode j ; :: thesis:
InsCode i <= 12 by Lm2;
then not not InsCode i = 0 & ... & not InsCode i = 12 by NAT_1:60;

suppose ( InsCode i = 0 or InsCode i = 1 or InsCode i = 2 or InsCode i = 3 or InsCode i = 4 or InsCode i = 5 or InsCode i = 6 or InsCode i = 7 or InsCode i = 8 ) ; :: thesis:

then ( i in SCM-Instr & j in SCM-Instr ) by A1, Th7;
hence dom (JumpPart i) = dom (JumpPart j) by A1, COMPOS_0:def 5; :: thesis:

end;

suppose ( InsCode i = 9 or InsCode i = 10 ) ; :: thesis:

then ( JumpPart i = {} & JumpPart j = {} ) by A1, Lm3;
hence dom (JumpPart i) = dom (JumpPart j) ; :: thesis:

end;

suppose ( InsCode i = 11 or InsCode i = 12 ) ; :: thesis:

then ( JumpPart i = {} & JumpPart j = {} ) by A1, Lm4;
hence dom (JumpPart i) = dom (JumpPart j) ; :: thesis:

end;

end;