let k be Element of NAT ; for a, b being Int-Location holds IncAddr (SubFrom a,b),k = SubFrom a,b
let a, b be Int-Location ; IncAddr (SubFrom a,b),k = SubFrom a,b
( InsCode (SubFrom a,b) = 3 & not 3 in {6,7,8} )
by ENUMSET1:def 1, SCMFSA_2:44;
hence
IncAddr (SubFrom a,b),k = SubFrom a,b
by Def3; verum