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@ -1209,11 +1209,9 @@ Proof.
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assert (N: nth_error (tm_step m) (2^j) = Some true).
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replace (nth_error (tm_step m) (2^j)) with (nth_error (tm_step (S j)) (2^j)).
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rewrite tm_step_single_bit_index. reflexivity.
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apply tm_step_stable. rewrite <- Nat.mul_1_l at 1.
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rewrite Nat.pow_succ_r. rewrite <- Nat.mul_lt_mono_pos_r.
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apply Nat.lt_1_2.
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rewrite <- Nat.neq_0_lt_0. apply Nat.pow_nonzero. easy.
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apply Nat.le_0_l. assumption.
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apply tm_step_stable.
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apply Nat.pow_lt_mono_r. apply Nat.lt_1_2. apply Nat.lt_succ_diag_r.
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assumption.
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assert (G: k = 0 \/ 0 < k). apply Nat.eq_0_gt_0_cases. destruct G.
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