let s be All-State of SumTuring; for p, h, t being set st s = [p,h,t] & p <> 5 holds
Following s = [((TRAN s) `1_3),((Head s) + (offset (TRAN s))),(Tape-Chg ((s `3_3),(Head s),((TRAN s) `2_3)))]
let p, h, t be set ; ( s = [p,h,t] & p <> 5 implies Following s = [((TRAN s) `1_3),((Head s) + (offset (TRAN s))),(Tape-Chg ((s `3_3),(Head s),((TRAN s) `2_3)))] )
assume A1:
( s = [p,h,t] & p <> 5 )
; Following s = [((TRAN s) `1_3),((Head s) + (offset (TRAN s))),(Tape-Chg ((s `3_3),(Head s),((TRAN s) `2_3)))]
5 = the AcceptS of SumTuring
by Def14;
hence
Following s = [((TRAN s) `1_3),((Head s) + (offset (TRAN s))),(Tape-Chg ((s `3_3),(Head s),((TRAN s) `2_3)))]
by A1, Th25; verum