Stories about Friedhelm Waldhausen by members of the algebraic topology community
Friedhelm Waldhausen passed away on November 21, 2024. The following are thoughts and stories about Waldhausen that were shared by members of the alg-top email list.
Stories about Friedhelm Waldhausen by members of the algebraic topology community
Friedhelm Waldhausen passed away on November 21, 2024. The following are thoughts and stories about Waldhausen that were shared by members of the alg-top email list.
BY сладко стянул
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Telegram was co-founded by Pavel and Nikolai Durov, the brothers who had previously created VKontakte. VK is Russia’s equivalent of Facebook, a social network used for public and private messaging, audio and video sharing as well as online gaming. In January, SimpleWeb reported that VK was Russia’s fourth most-visited website, after Yandex, YouTube and Google’s Russian-language homepage. In 2016, Forbes’ Michael Solomon described Pavel Durov (pictured, below) as the “Mark Zuckerberg of Russia.” Russian President Vladimir Putin launched Russia's invasion of Ukraine in the early-morning hours of February 24, targeting several key cities with military strikes. In a message on his Telegram channel recently recounting the episode, Durov wrote: "I lost my company and my home, but would do it again – without hesitation." 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. On Feb. 27, however, he admitted from his Russian-language account that "Telegram channels are increasingly becoming a source of unverified information related to Ukrainian events."
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