В пространстве легко расположить 6 кубов с попарно непересекающимися внутренностями так, чтобы каждые 2 соприкасались по многоугольнику ненулевой площади. Как доказать, что нельзя больше? Какое максимальное число произвольных тетраэдров можно расположить таким же образом? А произвольных выпуклых многогранников?
В пространстве легко расположить 6 кубов с попарно непересекающимися внутренностями так, чтобы каждые 2 соприкасались по многоугольнику ненулевой площади. Как доказать, что нельзя больше? Какое максимальное число произвольных тетраэдров можно расположить таким же образом? А произвольных выпуклых многогранников?
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. The regulator said it had received information that messages containing stock tips and other investment advice with respect to selected listed companies are being widely circulated through websites and social media platforms such as Telegram, Facebook, WhatsApp and Instagram. The channel appears to be part of the broader information war that has developed following Russia's invasion of Ukraine. The Kremlin has paid Russian TikTok influencers to push propaganda, according to a Vice News investigation, while ProPublica found that fake Russian fact check videos had been viewed over a million times on Telegram. Elsewhere, version 8.6 of Telegram integrates the in-app camera option into the gallery, while a new navigation bar gives quick access to photos, files, location sharing, and more. "There are several million Russians who can lift their head up from propaganda and try to look for other sources, and I'd say that most look for it on Telegram," he said.
from jp
