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@pixelcode@social.tchncs.de
2025-06-05 22:25:31
Content warning: SimpleX founder approving of right-wing extremism

Today, I learned that the founder of the #SimpleX messenger is a #ClimateChange-denying #Covid conspiracy-theorist, anti-vaxxer and

Twitter profile of Evgeny Poberezkin, the founder of SimpleX and creator of the Ajv JSON validator. Viewed via the Nitter server XCancel. On 30 May, Evgeny retweeted a post from Andrew Bridgen which reads: “It was a military operation across the world from the development of the virus and so-called vaccines to the delivery of the propaganda narrative to increase compliance.” Bridgen's tweet quotes an image shared by Liz Churchill, reading: “Dutch government official admits Covid pandemic …
On 28 May, Evgeny retweeted a post from Sayer Ji reading: “Americans Are Fed Up! In just 24 hours, over 20,000 emails have been sent to Congress demanding an investigation into unauthorized geoengineering and atmospheric spraying. People are taking a stand for transparency, accountability, and the right to clean skies.”
On 16 March, Evgeny Poberezkin retweeted JD Vance's screenshot of Donald Trump's Truth Social post with a picture showing three presidential photos: 2017 – 2021: happy Trump 2021 – 2025: a robot pen faking Biden's signature 2025 – present: mad Trump
On 26 February, Evgeny Poberezkin retweeted a post from the Twitter profile “Bill Gates is a psycho”, reading: “That’s where the money is. There is no consensus in Science, it’s about facts, and if you get down to the cold hard facts – climate change is not happening – there is no man made Global Warming now & there hasn’t been any in the past. I resent you calling me a ‘Denier” this is a word meant to put me down - there is NO significant Global Warming. John Coleman is a Meteorological exp…
@arXiv_mathAP_bot@mastoxiv.page
2025-06-06 07:24:35

Remarks on radial symmetry of stationary and uniformly-rotating solutions for the 2D Euler equation
Boquan Fan, Yuchen Wang, Weicheng Zhan
arxiv.org/abs/2506.05034

Remarks on radial symmetry of stationary and uniformly-rotating solutions for the 2D Euler equation
We prove that any uniformly rotating solution of the 2D incompressible Euler equation with compactly supported vorticity $ω$ must be radially symmetric whenever its angular velocity satisfies $Ω\in (-\infty,\inf ω/ 2] \cup \, [ \sup ω/ 2, +\infty )$, in both the patch and smooth settings. This result extends the rigidity theorems established in \cite{Gom2021MR4312192} (\textit{Duke Math. J.},170(13):2957-3038, 2021), which were confined to the case of non-positive angular velocities and non…