Ulrich Pennig

Gustave Doré 'Paradise Lost' showing Lucifer in the center surrounded by snakes, demons and dragons.

Thoughts & prayers to the EPA :(

#DasGewichtDerWelt

Ein Porträt dreier Akteure aus den Wissenschaften, die sehen, dass ihre Forschung nicht mehr reicht.

Ab 7.5. im Kino.

Previews ab 26.4. in Bonn, Köln, Mainz, Potsdam, Berlin, Hamburg.

Hier nun ein längerer Film-Teaser.
Auch zum Teilen auf YouTube:
▶️ youtube.com/shorts/3_JNH...

Wechselrezepte — Digital Independence Day An jedem ersten Sonntag im Monat veranstalten wir den Digital Independence Day. Wir holen uns unser freies digitales Leben zurück und wechseln zu demokratiefreundlichen digitalen Alternativen.

If you are looking for ways to switch away from Big Tech, then this list might be helpful:
di.day/de/wechselre...
(page is in German)

"God save the Queen" 😄

It’s the empty door, I assume. 😄

Two strips of paper glued together to form two Möbius strips.

The two Möbius strips glued together back to back.

Cut both strips open along the middle circle. The picture shows what this looks like when you cut the first strip open.

If you have chosen the orientations of the Möbius strip correctly, then the result will look like two interlinked paper hearts, which are shown in the picture.

Happy (topological) Valentines Day!

Mad Ridley?

Happy Birthday, Ben!

Well done Bangor University Debating Society

Why Replacing Developers with AI is Going Horribly Wrong YouTube video by Mackard

This sounds like a good summary: www.youtube.com/watch?app=de...

Welcome to the Artificial Intelligence Incident Database The starting point for information about the AI Incident Database

Another website that future historians will find helpful (as we do not seem to be able to learn at our current stage): incidentdatabase.ai

Not sure either. Let's just never have Nazis again.

So I am not sure who was worse.

According to Schappacher (letter in Mathematical Intelligencer 1996) it was most certainly him [Ernst Witt] and not Oswald Teichmüller, who attended Emmy Noether's private seminar held in her house while wearing his SA-uniform.

The Wikipedia footnotes for Ernst Witt have this about him:

There is also Teichmüller 😬

Yes, even 3-categories become quite involved (see www.ams.org/books/memo/0...).

Oh, so this is not 2-vector spaces a la Kapranov and Voevodsky?

TA's would be very helpful.

I am half-way through my pile of 200 exams and feel already completely drained. How do you manage 400?

Barbara Giunti: DONUT - Database of Original Non-theoretical Uses of Topology YouTube video by Applied Algebraic Topology Network

Have some (applied) topology research you want to share with the world? Consider adding it to 🍩DONUT🍩, our Database of Original & Non-Theoretical Uses of Topology.

Great intro by Barbara Giunti: www.youtube.com/watch?v=eQ_5...

🏠 donut.topology.rocks

It's only 3 weeks since the US invaded Venezuela, captured its president and appropriated its oil.

And yet it's barely been in the news for last week or two cos of all the other new shit.

What a world.

makes it hard for me & @sandylaping.bsky.social to stay on top of www.trumpactiontracker.info!

KI-generiertes Fake-Bild eines KZ-Häftlings, dazu der Text "Dieses Bild wurde mit KI generiert" davor der Text "Fake-KI-Bilder verzerren Geschichte."

Das gleiche Bild, davor der Text: "Das ist schlimm für Angehörige. Und es unterdrückt vielfältige Stimmen. Echte historische Fotos aus den Lagern sind eine Rarität und oftmals Propagandabilder."

Das gleiche Bild, davor der Text: "Wir fordern eine deutlich sichtbare Kennzeichnungspflicht von KI in den Sozialen Medien. Wir wünschen uns in der Bildung einen stärkeren Fokus auf Medien- und KI-Kompetenz."

Das gleiche Bild, davor der Text: "Was du konkret tun kannst: Like und teile diese Beiträge nicht. Melde sie. Folge den Accounts von Gedenkstätten und Lernorten, die recherchebasierte Geschichten erzählen."

Gedenkstätten, Lernorte, Museen und Archive haben einen offenen Brief veröffentlicht: „𝗞𝗼𝗻𝘀𝗲𝗾𝘂𝗲𝗻𝘁𝗲𝘀 𝗩𝗼𝗿𝗴𝗲𝗵𝗲𝗻 𝗴𝗲𝗴𝗲𝗻 𝗞𝗜-𝗴𝗲𝗻𝗲𝗿𝗶𝗲𝗿𝘁𝗲 𝗛𝗼𝗹𝗼𝗰𝗮𝘂𝘀𝘁-𝗩𝗲𝗿𝗳ä𝗹𝘀𝗰𝗵𝘂𝗻𝗴𝗲𝗻 𝗮𝘂𝗳 𝗦𝗼𝗰𝗶𝗮𝗹 𝗠𝗲𝗱𝗶𝗮-𝗣𝗹𝗮𝘁𝘁𝗳𝗼𝗿𝗺𝗲𝗻“. Hier geht es zum ganzen Text: www.gedenkstaetten-hamburg.de/de/aktuelles...

Do you love operator algebras? Join us in the Abacws Building at Cardiff University for the next meeting of our research network Operator Algebras in the South of the UK in Cardiff from 19th to 20th March 2026. Details can be found on our homepage
sites.google.com/view/operato... #Maths #Research

12/25/25 Music for the Holidays with cellist and composer Zoe Keating YouTube video by Across the Fence

Would you like 30 mins that has nothing to do with any of the big important things happening out there? Here is a performance and interview for Vermont’s wonderful show Across the Fence. It aired on Christmas Day but I was mostly offline and forgot to post about it.

About the Welsh Citizenship Test Situation... YouTube video by Rhapsody in Lingo

I have been following @israellai.bsky.social 's journey to Learning Welsh. Now he wants to do the British Citizenship Test in Welsh, which seems to be quite difficult: www.youtube.com/watch?v=JYFu...
#Welsh #Wales #LearningWelsh

Students call on Cardiff University to 'open the books' as cuts concerns continue Martin Shipton Cardiff University students are demanding that the university authorities answer a series of searching questions following a traumatic year in which more than 1,800 academics were origi...

Cardiff University students are demanding that the university authorities answer a series of searching questions following a traumatic year in which more than 1,800 academics were originally put ‘in scope’ for redundancy ✍️Martin Shipton

Dharma Initiative - Wikipedia

This picture makes them look like members of the Dharma initiative (en.wikipedia.org/wiki/Dharma_...).

now where are all those red letters...