18 декабря в МИАН будет лекция для учителей Николая Николаевича Андреева о сходствах и различиях трех геометрий (евклидовой, сферической, геометрии Лобачевского)
18 декабря в МИАН будет лекция для учителей Николая Николаевича Андреева о сходствах и различиях трех геометрий (евклидовой, сферической, геометрии Лобачевского)
BY Математура: книги МЦНМО
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I want a secure messaging app, should I use Telegram? He said that since his platform does not have the capacity to check all channels, it may restrict some in Russia and Ukraine "for the duration of the conflict," but then reversed course hours later after many users complained that Telegram was an important source of information. The gold standard of encryption, known as end-to-end encryption, where only the sender and person who receives the message are able to see it, is available on Telegram only when the Secret Chat function is enabled. Voice and video calls are also completely encrypted. Messages are not fully encrypted by default. That means the company could, in theory, access the content of the messages, or be forced to hand over the data at the request of a government. The last couple days have exemplified that uncertainty. On Thursday, news emerged that talks in Turkey between the Russia and Ukraine yielded no positive result. But on Friday, Reuters reported that Russian President Vladimir Putin said there had been some “positive shifts” in talks between the two sides.
from nl
