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у Мат. Этюдов недавно появились разные картинки и разговоры на тему [модели Пуанкаре] плоскости Лобачевского

в частности, можно смотреть на разные замощения плоскости Лобаческого одинаковыми правильными многоугольниками



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https://etudes.ru/etudes/Lobachevskian-geometry-Poincare-disk-model/

у Мат. Этюдов недавно появились разные картинки и разговоры на тему [модели Пуанкаре] плоскости Лобачевского

в частности, можно смотреть на разные замощения плоскости Лобаческого одинаковыми правильными многоугольниками

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Now safely in France with his spouse and three of his children, Kliuchnikov scrolls through Telegram to learn about the devastation happening in his home country. There was another possible development: Reuters also reported that Ukraine said that Belarus could soon join the invasion of Ukraine. However, the AFP, citing a Pentagon official, said the U.S. hasn’t yet seen evidence that Belarusian troops are in Ukraine. Stocks closed in the red Friday as investors weighed upbeat remarks from Russian President Vladimir Putin about diplomatic discussions with Ukraine against a weaker-than-expected print on U.S. consumer sentiment. At the start of 2018, the company attempted to launch an Initial Coin Offering (ICO) which would enable it to enable payments (and earn the cash that comes from doing so). The initial signals were promising, especially given Telegram’s user base is already fairly crypto-savvy. It raised an initial tranche of cash – worth more than a billion dollars – to help develop the coin before opening sales to the public. Unfortunately, third-party sales of coins bought in those initial fundraising rounds raised the ire of the SEC, which brought the hammer down on the whole operation. In 2020, officials ordered Telegram to pay a fine of $18.5 million and hand back much of the cash that it had raised. Some privacy experts say Telegram is not secure enough
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