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Diffstat (limited to 'mathcomp/ssreflect/seq.v')
| -rw-r--r-- | mathcomp/ssreflect/seq.v | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mathcomp/ssreflect/seq.v b/mathcomp/ssreflect/seq.v index 920f393..b202dd0 100644 --- a/mathcomp/ssreflect/seq.v +++ b/mathcomp/ssreflect/seq.v @@ -2008,6 +2008,9 @@ Proof. by rewrite -cats1 prefix_subseq. Qed. Lemma subseq_uniq s1 s2 : subseq s1 s2 -> uniq s2 -> uniq s1. Proof. by case/subseqP=> m _ -> Us2; apply: mask_uniq. Qed. +Lemma take_uniq s n : uniq s -> uniq (take n s). +Proof. exact/subseq_uniq/take_subseq. Qed. + End Subseq. Prenex Implicits subseq. |