File: example.phx

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(*
    Example proof script for PhoX Proof General

    example.phx,v 8.0 2004/04/17 23:40:00 da Exp
*)

(*
goal /\n:N (ack n N1 >= N2).
intro 2.
elim H.
trivial.
elim -1 [case] H0.
trivial.
trivial.
save ack_lem7.
*)

prop (* test *) (* just un test *) test /\X (X -> X).
print $0.
trivial.
save.