Известная в узких кругах take lemma для конечных списков через обобщенный take_take:
Lemma take_take_min {T} i j (s : seq T) : take i (take j s) = take (minn i j) s. Proof. by elim: s i j => //= a l IH [|i] [|j] //=; rewrite minnSS IH. Qed.
Lemma take_lemma {T} (p r : seq T) : (forall i, take i p = take i r) <-> p = r. Proof. split; last by move=>->. move=>H; move: (H (size p)) (H (size r)); rewrite !take_size=>{H} Hp Hr. by rewrite Hp -Hr {2 3}Hp !take_take_min minnAC minnn minnC. Qed.
Известная в узких кругах take lemma для конечных списков через обобщенный take_take:
Lemma take_take_min {T} i j (s : seq T) : take i (take j s) = take (minn i j) s. Proof. by elim: s i j => //= a l IH [|i] [|j] //=; rewrite minnSS IH. Qed.
Lemma take_lemma {T} (p r : seq T) : (forall i, take i p = take i r) <-> p = r. Proof. split; last by move=>->. move=>H; move: (H (size p)) (H (size r)); rewrite !take_size=>{H} Hp Hr. by rewrite Hp -Hr {2 3}Hp !take_take_min minnAC minnn minnC. Qed.
Telegram Android app: Open the chats list, click the menu icon and select “New Channel.” The imprisonment came as Telegram said it was "surprised" by claims that privacy commissioner Ada Chung Lai-ling is seeking to block the messaging app due to doxxing content targeting police and politicians. The visual aspect of channels is very critical. In fact, design is the first thing that a potential subscriber pays attention to, even though unconsciously. Developing social channels based on exchanging a single message isn’t exactly new, of course. Back in 2014, the “Yo” app was launched with the sole purpose of enabling users to send each other the greeting “Yo.” Matt Hussey, editorial director of NEAR Protocol (and former editor-in-chief of Decrypt) responded to the news of the Telegram group with “#meIRL.”
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