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(* GNU General Public License for more details.                       *)
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(* 02110-1301 USA                                                     *)

Lemma BDDneg_memo_OK_1_lemma_3_1' :
forall (cfg : BDDconfig) (memo : BDDneg_memo),
BDDconfig_OK cfg ->
BDDneg_memo_OK_2 cfg memo ->
BDDneg_memo_OK_2 cfg (BDDneg_memo_put memo BDDone BDDzero).