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@ -311,7 +311,7 @@ Proof.
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assert ({ subsequence2 l s } + { ~ subsequence2 l s }).
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apply subsequence2_dec. assumption. destruct H0.
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apply subsequence_eq_def_2 in s0. left. assumption.
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right. unfold not. intro I.
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right. intro I.
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apply subsequence_eq_def_3 in I.
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apply subsequence_eq_def_1 in I.
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apply n in I. contradiction I.
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@ -326,7 +326,7 @@ Proof.
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assert ({ subsequence3 l s } + { ~ subsequence3 l s }).
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apply subsequence3_dec. assumption. destruct H0.
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apply subsequence_eq_def_3 in s0. left. assumption.
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right. unfold not. intro I.
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right. intro I.
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apply subsequence_eq_def_1 in I.
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apply subsequence_eq_def_2 in I.
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apply n in I. contradiction I.
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