let N be non empty with_non-empty_elements set ; for S being non empty stored-program IC-Ins-separated definite AMI-Struct of N
for i being Instruction of S
for l being Element of NAT holds JUMP i c= NIC (i,l)
let S be non empty stored-program IC-Ins-separated definite AMI-Struct of N; for i being Instruction of S
for l being Element of NAT holds JUMP i c= NIC (i,l)
let i be Instruction of S; for l being Element of NAT holds JUMP i c= NIC (i,l)
let l be Element of NAT ; JUMP i c= NIC (i,l)
set X = { (NIC (i,k)) where k is Element of NAT : verum } ;
let x be set ; TARSKI:def 3 ( not x in JUMP i or x in NIC (i,l) )
A1:
NIC (i,l) in { (NIC (i,k)) where k is Element of NAT : verum }
;
assume
x in JUMP i
; x in NIC (i,l)
hence
x in NIC (i,l)
by A1, SETFAM_1:def 1; verum