Была неизвестна точная оценка, при каком минимальном A можно из прямоугольника 1 на A склеить лист Мёбиуса и изометрично (не растягивая и не сжимая) вложить (то есть без углов) в трёхмерное пространство (см. и книжку Математический дивертисмент). Я много где студентам и школьникам про это рассказывал, рекламировал.
А недавно Ричард Шварц доказал, что оценка A>√3 оптимальная (видео).
Была неизвестна точная оценка, при каком минимальном A можно из прямоугольника 1 на A склеить лист Мёбиуса и изометрично (не растягивая и не сжимая) вложить (то есть без углов) в трёхмерное пространство (см. и книжку Математический дивертисмент). Я много где студентам и школьникам про это рассказывал, рекламировал.
А недавно Ричард Шварц доказал, что оценка A>√3 оптимальная (видео).
Telegram boasts 500 million users, who share information individually and in groups in relative security. But Telegram's use as a one-way broadcast channel — which followers can join but not reply to — means content from inauthentic accounts can easily reach large, captive and eager audiences. It is unclear who runs the account, although Russia's official Ministry of Foreign Affairs Twitter account promoted the Telegram channel on Saturday and claimed it was operated by "a group of experts & journalists." The War on Fakes channel has repeatedly attempted to push conspiracies that footage from Ukraine is somehow being falsified. One post on the channel from February 24 claimed without evidence that a widely viewed photo of a Ukrainian woman injured in an airstrike in the city of Chuhuiv was doctored and that the woman was seen in a different photo days later without injuries. The post, which has over 600,000 views, also baselessly claimed that the woman's blood was actually makeup or grape juice. Multiple pro-Kremlin media figures circulated the post's false claims, including prominent Russian journalist Vladimir Soloviev and the state-controlled Russian outlet RT, according to the DFR Lab's report. Perpetrators of these scams will create a public group on Telegram to promote these investment packages that are usually accompanied by fake testimonies and sometimes advertised as being Shariah-compliant. Interested investors will be asked to directly message the representatives to begin investing in the various investment packages offered.
from us
