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В сюжете «Геометрия Лобачевского: интерактивная модель Пуанкаре в круге»
https://etudes.ru/etudes/Lobachevskian-geometry-Poincare-disk-model/
появились новые возможности.

Калейдоскоп одинаковых правильных многоугольников можно строить так, чтобы в центре абсолюта был центр одного из многоугольников, а можно таким образом, чтобы в центре абсолюта находилась вершина замощения.

И в том, и в другом случае получившиеся картины теперь можно сохранить в векторном формате PDF!

Напомним и о цикле гравюр Маурица Эшера «Circle Limit».



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В сюжете «Геометрия Лобачевского: интерактивная модель Пуанкаре в круге»
https://etudes.ru/etudes/Lobachevskian-geometry-Poincare-disk-model/
появились новые возможности.

Калейдоскоп одинаковых правильных многоугольников можно строить так, чтобы в центре абсолюта был центр одного из многоугольников, а можно таким образом, чтобы в центре абсолюта находилась вершина замощения.

И в том, и в другом случае получившиеся картины теперь можно сохранить в векторном формате PDF!

Напомним и о цикле гравюр Маурица Эшера «Circle Limit».

BY Математические этюды





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If you initiate a Secret Chat, however, then these communications are end-to-end encrypted and are tied to the device you are using. That means it’s less convenient to access them across multiple platforms, but you are at far less risk of snooping. Back in the day, Secret Chats received some praise from the EFF, but the fact that its standard system isn’t as secure earned it some criticism. If you’re looking for something that is considered more reliable by privacy advocates, then Signal is the EFF’s preferred platform, although that too is not without some caveats. The message was not authentic, with the real Zelenskiy soon denying the claim on his official Telegram channel, but the incident highlighted a major problem: disinformation quickly spreads unchecked on the encrypted app. Lastly, the web previews of t.me links have been given a new look, adding chat backgrounds and design elements from the fully-features Telegram Web client. "We're seeing really dramatic moves, and it's all really tied to Ukraine right now, and in a secondary way, in terms of interest rates," Octavio Marenzi, CEO of Opimas, told Yahoo Finance Live on Thursday. "This war in Ukraine is going to give the Fed the ammunition, the cover that it needs, to not raise interest rates too quickly. And I think Jay Powell is a very tepid sort of inflation fighter and he's not going to do as much as he needs to do to get that under control. And this seems like an excuse to kick the can further down the road still and not do too much too soon." Overall, extreme levels of fear in the market seems to have morphed into something more resembling concern. For example, the Cboe Volatility Index fell from its 2022 peak of 36, which it hit Monday, to around 30 on Friday, a sign of easing tensions. Meanwhile, while the price of WTI crude oil slipped from Sunday’s multiyear high $130 of barrel to $109 a pop. Markets have been expecting heavy restrictions on Russian oil, some of which the U.S. has already imposed, and that would reduce the global supply and bring about even more burdensome inflation.
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