Рассмотрим небольшую выпуклую фигуру, и рассмотрим упаковки (то есть её образы не пересекаются) ею плоскости (не обязательно решётчатые — можно вращать её). У любой такой упаковки можно определить плотность (давайте например как супремум плотностей упаковки по расширяющимся кругам).
Тогда есть упаковка, плотность которой равна супремуму плотностей по всем упаковкам.
Как это быстро доказать? У меня какие-то длинные запутанные рассуждения, а факт-то кристально ясный
Рассмотрим небольшую выпуклую фигуру, и рассмотрим упаковки (то есть её образы не пересекаются) ею плоскости (не обязательно решётчатые — можно вращать её). У любой такой упаковки можно определить плотность (давайте например как супремум плотностей упаковки по расширяющимся кругам).
Тогда есть упаковка, плотность которой равна супремуму плотностей по всем упаковкам.
Как это быстро доказать? У меня какие-то длинные запутанные рассуждения, а факт-то кристально ясный
BY tropical saint petersburg
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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. "The inflation fire was already hot and now with war-driven inflation added to the mix, it will grow even hotter, setting off a scramble by the world’s central banks to pull back their stimulus earlier than expected," Chris Rupkey, chief economist at FWDBONDS, wrote in an email. "A spike in inflation rates has preceded economic recessions historically and this time prices have soared to levels that once again pose a threat to growth." 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. Right now the digital security needs of Russians and Ukrainians are very different, and they lead to very different caveats about how to mitigate the risks associated with using Telegram. For Ukrainians in Ukraine, whose physical safety is at risk because they are in a war zone, digital security is probably not their highest priority. They may value access to news and communication with their loved ones over making sure that all of their communications are encrypted in such a manner that they are indecipherable to Telegram, its employees, or governments with court orders. The regulator said it has been undertaking several campaigns to educate the investors to be vigilant while taking investment decisions based on stock tips.
from es
