Как ни странно, но даже чёткое определение, казалось бы, такого простого объекта, как многогранник, является не такой простой задачей. Желающим разобраться предлагаем посмотреть брошюру классика этой темы – Николай Петровича Долбилина – «Жемчужины теории многогранников».
Определения вершины многогранника можно давать разные. Но главной характеристикой вершины выпуклого многогранника является «недостаток угла» в этой точке https://etudes.ru/etudes/polyhedron-vertices/ .
Как ни странно, но даже чёткое определение, казалось бы, такого простого объекта, как многогранник, является не такой простой задачей. Желающим разобраться предлагаем посмотреть брошюру классика этой темы – Николай Петровича Долбилина – «Жемчужины теории многогранников».
Определения вершины многогранника можно давать разные. Но главной характеристикой вершины выпуклого многогранника является «недостаток угла» в этой точке https://etudes.ru/etudes/polyhedron-vertices/ .
Groups are also not fully encrypted, end-to-end. This includes private groups. Private groups cannot be seen by other Telegram users, but Telegram itself can see the groups and all of the communications that you have in them. All of the same risks and warnings about channels can be applied to groups. DFR Lab sent the image through Microsoft Azure's Face Verification program and found that it was "highly unlikely" that the person in the second photo was the same as the first woman. The fact-checker Logically AI also found the claim to be false. The woman, Olena Kurilo, was also captured in a video after the airstrike and shown to have the injuries. The picture was mixed overseas. Hong Kong’s Hang Seng Index fell 1.6%, under pressure from U.S. regulatory scrutiny on New York-listed Chinese companies. Stocks were more buoyant in Europe, where Frankfurt’s DAX surged 1.4%. At its heart, Telegram is little more than a messaging app like WhatsApp or Signal. But it also offers open channels that enable a single user, or a group of users, to communicate with large numbers in a method similar to a Twitter account. This has proven to be both a blessing and a curse for Telegram and its users, since these channels can be used for both good and ill. Right now, as Wired reports, the app is a key way for Ukrainians to receive updates from the government during the invasion. On February 27th, Durov posted that Channels were becoming a source of unverified information and that the company lacks the ability to check on their veracity. He urged users to be mistrustful of the things shared on Channels, and initially threatened to block the feature in the countries involved for the length of the war, saying that he didn’t want Telegram to be used to aggravate conflict or incite ethnic hatred. He did, however, walk back this plan when it became clear that they had also become a vital communications tool for Ukrainian officials and citizens to help coordinate their resistance and evacuations.
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