∀ n, O = (n × O)

Theorem times_n_O : forall (n:nat), logic.eq (nat) O (times n O).

theorem times_n_O : \forall (n:nat). (eq) (nat) (O) ((times) n (O) ).

theorem times_n_O : forall (n:nat.nat) , (((logic.eq_) (nat.nat)) ((nat.O) )) ((((nat.times) ) (n)) ((nat.O) )).

times_n_O : LEMMA (FORALL(n:nat_sttfa.sttfa_nat):logic_sttfa_th.eq[nat_sttfa.sttfa_nat](nat_sttfa.sttfa_O)(nat_sttfa.times(n)(nat_sttfa.sttfa_O)))

Printing for OpenTheory is not working at the moment.