Выкладываем запись лекции главного редактора журнала «Квантик» Дориченко Сергея Александровича «Об укладке блинов, котлет и апельсинов», которую он прочитал 26 октября для Лектория Малого мехмата.
На лекции разобраны несколько этюдов из комбинаторной геометрии. Например, вы узнаете, почему на круглую сковороду, где поместилось 6 одинаковых круглых котлет, влезет и 7 таких котлет, а если в куб поместилось 3 одинаковых апельсина, то поместится и 4.
Выкладываем запись лекции главного редактора журнала «Квантик» Дориченко Сергея Александровича «Об укладке блинов, котлет и апельсинов», которую он прочитал 26 октября для Лектория Малого мехмата.
На лекции разобраны несколько этюдов из комбинаторной геометрии. Например, вы узнаете, почему на круглую сковороду, где поместилось 6 одинаковых круглых котлет, влезет и 7 таких котлет, а если в куб поместилось 3 одинаковых апельсина, то поместится и 4.
Apparently upbeat developments in Russia's discussions with Ukraine helped at least temporarily send investors back into risk assets. Russian President Vladimir Putin said during a meeting with his Belarusian counterpart Alexander Lukashenko that there were "certain positive developments" occurring in the talks with Ukraine, according to a transcript of their meeting. Putin added that discussions were happening "almost on a daily basis." At this point, however, Durov had already been working on Telegram with his brother, and further planned a mobile-first social network with an explicit focus on anti-censorship. Later in April, he told TechCrunch that he had left Russia and had “no plans to go back,” saying that the nation was currently “incompatible with internet business at the moment.” He added later that he was looking for a country that matched his libertarian ideals to base his next startup. Telegram does offer end-to-end encrypted communications through Secret Chats, but this is not the default setting. Standard conversations use the MTProto method, enabling server-client encryption but with them stored on the server for ease-of-access. This makes using Telegram across multiple devices simple, but also means that the regular Telegram chats you’re having with folks are not as secure as you may believe. 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. 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.
from cn
