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Posts by Ulrich Pennig

I know, right? I sat in a similar train last time I went to Kyoto. Have you seen the mechanism that turns the seats in the carriage to face in the direction of travel? Japanese trains are awesome.

4 days ago 1 0 0 0

Even the tech bro bullshit machines agree on that one. Here is Gemini: "This image definitely skips the medical degree and goes straight for the messianic iconography. [...] the visual language is pulled directly from traditional religious art rather than a hospital hallway."

1 week ago 0 0 0 0

😬

1 week ago 1 0 0 0

Wait until they suggest that AI should do the reporting as well... 🙁

4 weeks ago 1 0 0 0
Participants of the workshop "Operator Algebras in the South of the UK" posing for a group photo on the staircase of the Abacws building in Cardiff.

Participants of the workshop "Operator Algebras in the South of the UK" posing for a group photo on the staircase of the Abacws building in Cardiff.

Last week, Cardiff University hosted the latest meeting of Operator Algebras in the South, which is a regional network bringing together researchers in operator algebras and related areas across the South of the UK. We had a fantastic line-up of speakers and were funded by the LMS and the INI.

1 month ago 1 0 0 0
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"I hate Reform and everything they stand for".

Welsh grandmother doesn't hold back as she breaks down why she would never vote for Nigel Farage's party.

You can see analysis and news from Welsh politics by signing up for my news letter (see comments).

1 month ago 1126 364 46 18
Gustave Doré 'Paradise Lost' showing Lucifer in the center surrounded by snakes, demons and dragons.

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

1 month ago 1 0 0 0
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Thoughts & prayers to the EPA :(

1 month ago 2216 761 47 51
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Video

#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...

1 month ago 508 276 15 8
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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)

1 month ago 0 0 0 0

"God save the Queen" 😄

2 months ago 1 0 0 0

It’s the empty door, I assume. 😄

2 months ago 2 0 1 0
Two strips of paper glued together to form two Möbius strips.

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

The two Möbius strips glued together back to back.

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.

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.

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!

2 months ago 22 6 0 2

Mad Ridley?

2 months ago 0 0 0 0

Happy Birthday, Ben!

2 months ago 0 0 0 0
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Well done Bangor University Debating Society

2 months ago 68 16 0 3
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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...

2 months ago 1 0 0 0
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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

2 months ago 3 0 0 0

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

2 months ago 3 0 0 0

So I am not sure who was worse.

2 months ago 2 0 1 0
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.

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:

2 months ago 2 0 1 0

There is also Teichmüller 😬

2 months ago 4 0 2 0

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

2 months ago 2 0 2 0
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Oh, so this is not 2-vector spaces a la Kapranov and Voevodsky?

2 months ago 1 0 1 0

TA's would be very helpful.

2 months ago 1 0 0 0

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

2 months ago 3 0 1 0
Barbara Giunti: DONUT - Database of Original Non-theoretical Uses of Topology
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

2 months ago 3 3 0 0

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!

2 months ago 332 88 19 8
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1 year ago 17266 15938 90 342
KI-generiertes Fake-Bild eines KZ-Häftlings, dazu der Text "Dieses Bild wurde mit KI generiert" davor der Text "Fake-KI-Bilder verzerren Geschichte."

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: "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: "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."

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...

3 months ago 135 76 0 4