let N be with_non-empty_elements set ; :: thesis: for S being non empty stored-program IC-Ins-separated definite standard AMI-Struct of NAT ,N
for l being Instruction-Location of S holds l -' 0 = l
let S be non empty stored-program IC-Ins-separated definite standard AMI-Struct of NAT ,N; :: thesis: for l being Instruction-Location of S holds l -' 0 = l
let l be Instruction-Location of S; :: thesis: l -' 0 = l
thus l -' 0 = il. S,(locnum l) by NAT_D:40
.= l by Def13 ; :: thesis: verum