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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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Stocks dropped on Friday afternoon, as gains made earlier in the day on hopes for diplomatic progress between Russia and Ukraine turned to losses. Technology stocks were hit particularly hard by higher bond yields. What distinguishes the app from competitors is its use of what's known as channels: Public or private feeds of photos and videos that can be set up by one person or an organization. The channels have become popular with on-the-ground journalists, aid workers and Ukrainian President Volodymyr Zelenskyy, who broadcasts on a Telegram channel. The channels can be followed by an unlimited number of people. Unlike Facebook, Twitter and other popular social networks, there is no advertising on Telegram and the flow of information is not driven by an algorithm. And while money initially moved into stocks in the morning, capital moved out of safe-haven assets. The price of the 10-year Treasury note fell Friday, sending its yield up to 2% from a March closing low of 1.73%. Oleksandra Matviichuk, a Kyiv-based lawyer and head of the Center for Civil Liberties, called Durov’s position "very weak," and urged concrete improvements.
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