Начнем-ка небольшую серию постов про коники, завязанную на моей курсовой
Пусть A₁A₂...A₂ₖ – это 2k-угольник Понселе на КОМПЛЕКСНОЙ проективной плоскости, вписанный в конику К и описанный около коники Г. (!) Прямые AᵢAᵢ₊ₖ пересекаются в одной точке, причем эта точка не зависит от выбора A₁ на К
Начнем-ка небольшую серию постов про коники, завязанную на моей курсовой
Пусть A₁A₂...A₂ₖ – это 2k-угольник Понселе на КОМПЛЕКСНОЙ проективной плоскости, вписанный в конику К и описанный около коники Г. (!) Прямые AᵢAᵢ₊ₖ пересекаются в одной точке, причем эта точка не зависит от выбора A₁ на К
(Выше картинка для восьмиугольгика)
BY Ботаем геому
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Russians and Ukrainians are both prolific users of Telegram. They rely on the app for channels that act as newsfeeds, group chats (both public and private), and one-to-one communication. Since the Russian invasion of Ukraine, Telegram has remained an important lifeline for both Russians and Ukrainians, as a way of staying aware of the latest news and keeping in touch with loved ones. Right now the digital security needs of Russians and Ukrainians are very different, and they lead to very different caveats about how to mitigate the risks associated with using Telegram. For Ukrainians in Ukraine, whose physical safety is at risk because they are in a war zone, digital security is probably not their highest priority. They may value access to news and communication with their loved ones over making sure that all of their communications are encrypted in such a manner that they are indecipherable to Telegram, its employees, or governments with court orders. Additionally, investors are often instructed to deposit monies into personal bank accounts of individuals who claim to represent a legitimate entity, and/or into an unrelated corporate account. To lend credence and to lure unsuspecting victims, perpetrators usually claim that their entity and/or the investment schemes are approved by financial authorities. If you initiate a Secret Chat, however, then these communications are end-to-end encrypted and are tied to the device you are using. That means it’s less convenient to access them across multiple platforms, but you are at far less risk of snooping. Back in the day, Secret Chats received some praise from the EFF, but the fact that its standard system isn’t as secure earned it some criticism. If you’re looking for something that is considered more reliable by privacy advocates, then Signal is the EFF’s preferred platform, although that too is not without some caveats. One thing that Telegram now offers to all users is the ability to “disappear” messages or set remote deletion deadlines. That enables users to have much more control over how long people can access what you’re sending them. Given that Russian law enforcement officials are reportedly (via Insider) stopping people in the street and demanding to read their text messages, this could be vital to protect individuals from reprisals.
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