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@ -2456,7 +2456,6 @@ Proof.
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reflexivity.
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reflexivity.
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rewrite Nat.mul_comm. replace (2^3) with 8.
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rewrite Nat.mul_comm. replace (2^3) with 8.
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replace 4 with (length (hd++a) mod 8) at 3.
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replace 4 with (length (hd++a) mod 8) at 3.
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rewrite <- Nat.div_mod_eq. rewrite <- H0 at 1.
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rewrite <- Nat.div_mod_eq. rewrite <- H0 at 1.
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@ -2471,10 +2470,13 @@ Proof.
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rewrite <- app_assoc. reflexivity. reflexivity.
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rewrite <- app_assoc. reflexivity. reflexivity.
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rewrite H2 in H1. rewrite H3 in H1. simpl in H1.
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rewrite H2 in H1. rewrite H3 in H1. simpl in H1.
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inversion H1. contradiction H4.
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destruct H1. assert (Some false = Some true).
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apply H4. reflexivity. inversion H5.
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rewrite Nat.add_comm.
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rewrite Nat.sub_add. reflexivity.
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apply Nat.lt_le_incl. assumption.
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Qed.
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