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Вот такие. [9] N. Linial, R. Meshulam, and M. Rosenthal, Sum complexes – a new family of hypertrees, Discrete Comput. Geom 44 (2010), 622–636. https://arxiv.org/abs/0903.1359 (скриншот из https://arxiv.org/abs/1707.09271 )
с гомологиями пространств петель все ещё хуже: существует односвязный клеточный комплекс из 19 клеток, у которого в целочисленных гомологиях петель есть Z/n для всех n

https://www.researchgate.net/publication/38341618_A_Loop_Space_whose_Homology_Has_Torsion_of_All_Orders
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с гомологиями пространств петель все ещё хуже: существует односвязный клеточный комплекс из 19 клеток, у которого в целочисленных гомологиях петель есть Z/n для всех n

https://www.researchgate.net/publication/38341618_A_Loop_Space_whose_Homology_Has_Torsion_of_All_Orders

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That hurt tech stocks. For the past few weeks, the 10-year yield has traded between 1.72% and 2%, as traders moved into the bond for safety when Russia headlines were ugly—and out of it when headlines improved. Now, the yield is touching its pandemic-era high. If the yield breaks above that level, that could signal that it’s on a sustainable path higher. Higher long-dated bond yields make future profits less valuable—and many tech companies are valued on the basis of profits forecast for many years in the future. 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. "Markets were cheering this economic recovery and return to strong economic growth, but the cheers will turn to tears if the inflation outbreak pushes businesses and consumers to the brink of recession," he added. DFR Lab sent the image through Microsoft Azure's Face Verification program and found that it was "highly unlikely" that the person in the second photo was the same as the first woman. The fact-checker Logically AI also found the claim to be false. The woman, Olena Kurilo, was also captured in a video after the airstrike and shown to have the injuries. For example, WhatsApp restricted the number of times a user could forward something, and developed automated systems that detect and flag objectionable content.
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