let s be All-State of U3(n)Turing; for p, h, t being set st s = [p,h,t] & p <> 3 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 <> 3 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 <> 3 )
; Following s = [((TRAN s) `1_3),((Head s) + (offset (TRAN s))),(Tape-Chg ((s `3_3),(Head s),((TRAN s) `2_3)))]
3 = the AcceptS of U3(n)Turing
by Def21;
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