Ulrich Pennig
@pennigulrich.bsky.social
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Senior Lecturer in Algebra and Topology at Cardiff University. All views are my own.
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Ulrich Pennig
Senator Bernie Sanders
about 9 hours ago
I will be pushing for a moratorium on the construction of data centers that are powering the unregulated sprint to develop & deploy AI. The moratorium will give democracy a chance to catch up, and ensure that the benefits of technology work for all of us, not just the 1%.
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It's Time for a Moratorium on Data Centers | Sen. Bernie Sanders
YouTube video by Senator Bernie Sanders
https://youtu.be/f40SFNcTOXo?si=j-FlGZMt-V4sr7Wx
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This is an excellent article. A lot of it reads painfully familiar.
www.currentaffairs.org/news/ai-is-d...
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AI is Destroying the University and Learning Itself
Students use AI to write papers, professors use AI to grade them, degrees become meaningless, and tech companies make fortunes. Welcome to the death of higher education.
https://www.currentaffairs.org/news/ai-is-destroying-the-university-and-learning-itself
10 days ago
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Will Hayward - Wales Journo
18 days ago
We have written a special report looking at the people behind Reform in Wales. This was a bizarre piece to write.
willhaywardwales.substack.com/p/special-re...
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Special report: Who are Reform in Wales?
We dived into the wild world of Reform UK in Cymru
https://willhaywardwales.substack.com/p/special-report-who-are-reform-in
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People Make Games reporting (in their usual excellent way) about the situation at Rockstar Games:
www.youtube.com/watch?v=c9nO...
and the follow-up
www.youtube.com/watch?v=8TvW...
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The Rockstar Workers Fired Before They Could Finish GTA 6
YouTube video by People Make Games
https://www.youtube.com/watch?v=c9nOwjeznjI
23 days ago
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Excited to share details about this upcoming one-day workshop bringing together leading researchers in operator algebras and related fields! - on Friday, 21st November 2025 - in the Fry Building, School of Mathematics, University of Bristol For details see:
sites.google.com/view/operato...
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LinkedIn
This link will take you to a page that’s not on LinkedIn
https://lnkd.in/ew9B5QNH
about 1 month ago
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Ulrich Pennig
Dave Richeson
about 2 months ago
In case anyone wants to make some of these boards, I put the laser-cutter templates on my blog.
divisbyzero.com/2025/11/01/a...
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Matthias Eberl
3 months ago
Full length video here, 9:01 minutes long - amazing work
@ledbydonkeys.org
.
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Trump & Epstein on Windsor castle #fyp
TikTok video by Led By Donkeys
https://www.tiktok.com/@ledbydonkeys/video/7550942110350888214
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'Meta CEO Mark Zuckerberg has told analysts that people without smart glasses may one day be at a "significant cognitive disadvantage" compared to those who do use the tech'
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3 months ago
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Today was the final day of the 38th British Topology Meeting. It was fun! Great to see so many young people in the field and hear all the recent developments.
3 months ago
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Ladies and Gentlemen! Elle Cordova:
www.youtube.com/shorts/AYm9w...
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For our scientists
YouTube video by Elle Cordova
https://www.youtube.com/shorts/AYm9w6W5B-E
3 months ago
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David Jekel
3 months ago
Here is Erisa today at the Gorom refugee settlement. Please share the fundraiser so I can send him more support (in addition to what I have sent personally)
www.gofundme.com/f/aid-for-er...
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The first step in a project that is dear to my heart has now appeared on the arXiv (
arxiv.org/abs/2509.04134
). In it we develop a unified framework describing how different notions of symmetries of operator algebras are interlinked. We reveal interesting connections with homotopy theory as well.
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G-kernels and Crossed Modules
We develop a unified framework based on topological crossed modules for various lifting obstructions for $Γ$-kernels. It allows us to identify actions, cocycle actions and $Γ$-kernels up to their natu...
https://arxiv.org/abs/2509.04134
3 months ago
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Matthias Eberl
4 months ago
Just a member of the UK parliament asking me, my family, my neighbours, my colleagues, school teachers, friends and a large proportion of the NHS to leave the country. And the richest person in the world endorsing the message.
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Ulrich Pennig
Otto English
4 months ago
I've a feeling Mr Farage might very much be regretting his trip... round about ... Now 👇
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Chris Bratt
4 months ago
Okay, big breath... After more than two years since we published our last documentary on the topic, it's time we returned to Disco Elysium:
www.youtube.com/watch?v=lZEA...
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We Need to Talk about Disco Elysium, Again
YouTube video by People Make Games
https://www.youtube.com/watch?v=lZEAs6M1wts
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Ulrich Pennig
Christian Wolf
4 months ago
arstechnica.com/science/2025...
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Bluesky now platform of choice for science community
It’s not just you. Survey says: “Twitter sucks now and all the cool kids are moving to Bluesky”…
https://arstechnica.com/science/2025/08/more-scientists-choose-bluesky-over-twitter/
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Ulrich Pennig
London Mathematical Society
4 months ago
We're delighted to be once again co-hosting the Black Heroes of Mathematics Conference, taking place at @DeMorganHouse (and online) on 1 and 2 October. Register now ➡️
www.lms.ac.uk/events/black...
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theHigherGeometer
4 months ago
We are advertising a Level D/E position in Pure Maths at University of Adelaide (for non-Oz-initiated: E=full Prof, D=one step down).
https://careers.adelaide.edu.au/cw/en/job/517088/associate-professor-professor-de-pure-mathematics
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Ulrich Pennig
Alexander Kasprzyk
4 months ago
Alvaro Torras Casas (Cardiff) speaking on "Dataset comparison using persistent homology morphisms" at our
#MachineLearning
#Math
seminar back in May 2023.
#MathSky
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Alvaro Torras Casas (Cardiff)
Alvaro Torras Casas (Cardiff)31 May 2023"Dataset comparison using persistent homology morphisms"Persistent homology summarizes geometrical information of dat...
https://www.youtube.com/watch?v=PBjJJWAjaP8
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Ulrich Pennig
Adi Onus
5 months ago
This November the place to be is Brisbane! Registration is now open for QTMC here
queertransmath.com
- be sure to sign up and tell your friends!
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Ulrich Pennig
Eva Soulu 🌿
4 months ago
Today is my birthday! Could you, please, share my art, it is the best gift an artist can get 💖
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Endless Screaming
4 months ago
AAAAAHHHHH
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Izabella Laba 🇨🇦
4 months ago
Are we still having the ICM in Philly next year?
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Quick reminder that registrations for the 38th British Topology Meeting in Cardiff are still open!
#topology
#MathSky
#AcademicSky
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5 months ago
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Alexander Kasprzyk
5 months ago
The devastating funding cuts to mathematics research in the US will cut-short the careers of a generation of mathematicians. It really is disgraceful, and unbelievably shortsighted.
#MathSky
www.scientificamerican.com/article/can-...
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Math Is Quietly in Crisis over NSF Funding Cuts
A 72 percent reduction in federal funding is devastating to math research. The American Mathematical Society is offering $1 million in backstop grants—but it’s likely not enough
https://www.scientificamerican.com/article/can-u-s-math-research-survive-nsf-funding-cuts/
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Ulrich Pennig
Annette Dittert
5 months ago
At last. This really is excellent news! Something the EU had asked for a very long time ago. Looks like Yvette Cooper now lost that battle to limit it to 12 months. Good. It's high time young Brits and Europeans can get to know each other again.
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Young Europeans may be allowed to stay in UK for longer than a year
A minister has opened the door for a reciprocal youth mobility scheme that could add to net migration figures despite concerns from the Home Office
https://www.thetimes.com/uk/politics/article/eu-youth-mobility-scheme-uk-7spbxfth0
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Ulrich Pennig
Good Law Project
5 months ago
TalkTV spreads hate and transphobia as if there was no consequences. Let's prove them wrong. Join over 10,000 people - send your complaint to Ofcom 👇
action.goodlawproject.org/ofcom-stop-t...
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Ofcom: stop TalkTV broadcasting hate
TalkTV is Rupert Murdoch’s Fox News for the UK – a constant source of toxic hate and far-right lies. Over the last 11 weeks, TalkTV has been spouting transphobic hate again and again – totally ignorin...
https://action.goodlawproject.org/ofcom-stop-talktv?utm_source=Bluesky&utm_campaign=OfcomComplaintTalkTV&utm_medium=Social
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I am visiting Belfast for a conference on topological groupoids and C*-algebras (
www.newton.ac.uk/event/tgaw02/
). Belfast is pretty in the summer!
5 months ago
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I am rewatching
#StarTrek
#DS9
at the moment and the episode "Past Tense" still hits very close to home. I remember that I thought "Nah, it's not going to be like that in 2024". Oh boy, was I wrong.
5 months ago
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Bookshop.org
5 months ago
You are cordially invited to our Anti-Prime Sale, where every purchase will financially support bookstores, NOT billionaires 🥳
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Petra Schwer
6 months ago
Kleine Erinnerung: Heute 17 Uhr in Heidelberg
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David Jekel
6 months ago
New math paper with Yoonkyeong Lee, Brent Nelson, and Jennifer Pi.
arxiv.org/abs/2506.19940
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Strong convergence to operator-valued semicirculars
We establish a framework for weak and strong convergence of matrix models to operator-valued semicircular systems parametrized by operator-valued covariance matrices $η= (η_{i,j})_{i,j \in I}$. Non-co...
https://arxiv.org/abs/2506.19940
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Ulrich Pennig
Margot Finn
6 months ago
Really quite an excoriating indictment of university governance, this. Desperately needs to be confronted by the sector as a whole rather than swept aside as an anomaly. This is not an edge case. Live reporting from the BBC:
www.bbc.co.uk/news/live/c1...
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Former Dundee University principal accused of being a coward
Prof Iain Gillespie, former principal and vice-chancellor of the University of Dundee, is grilled by members of Holyrood's Education Committee.
https://www.bbc.co.uk/news/live/c15wqn0zxx7t
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Ulrich Pennig
NationCymru
6 months ago
Vice Chancellor Larner wants Cardiff University to be a ‘living experiment’, as a ‘part social innovation lab, part corporate partnership innovation centre, part civic system transition space’ with constant ‘creative destruction and continual regeneration’
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Lecturers from Cardiff University predict its dystopian future
Anonymous What will a “leaner and more efficient” Cardiff University look like? Cardiff University’s Executive Board has set out their vision for ‘digital transformation’ in Wales in 2035, where ‘digi...
https://wp.me/p8Mk4U-11wm
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Ulrich Pennig
Andy Williams
6 months ago
This is a devastating piece of writing. Highly recommend. 🔥✊👇
www.iwa.wales/agenda/2025/...
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Disruption and market futurology at Cardiff University - Institute of Welsh Affairs
Cardiff University academics explain how the pace of cuts, commercialisation and techno-speculation at the institution risk its collapse.
https://www.iwa.wales/agenda/2025/06/disruption-and-market-futurology-at-cardiff-university/
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Ulrich Pennig
Andy Williams
6 months ago
Cardiff University formally agrees sweeping cuts that will see departments shut
www.walesonline.co.uk/news/educati...
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Cardiff University agrees sweeping cuts that will see entire departments shut
Cardiff University's council chair Pat Younge told staff and students the savings were 'painful but necessary'
https://www.walesonline.co.uk/news/education/cardiff-university-formally-agrees-sweeping-31884887.amp
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Ulrich Pennig
Cardiff UCU
6 months ago
"the UEB have provided no market analysis or evidence that this will pay off, let alone if it’s even academically sustainable" Council decides on the 'Academic Futures' proposal today.
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Prudence
From Anonymous Academic, Cardiff UniversityWhen Patrick Younge, Chair of Council, asked the Vice Chancellor what she thought was the most overrated virtue, her answer was striking: “Prudence.” Know…
https://cufightback.wordpress.com/2025/06/16/prudence/
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Ulrich Pennig
Cardiff UCU
6 months ago
BBC News coverage: 'Cardiff UCU has reported Cardiff University's University Executive Board (UEB) to the Health and Safety Executive (HSE) following a "comprehensive breakdown of trust and morale" between university bosses and staff'
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Cardiff University job cuts a health and safety crisis, says UCU
Cardiff UCU says its members have reported suicidal thoughts and high levels of anxiety amid cuts.
https://www.bbc.co.uk/news/articles/cm26qmgm5jgo
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Cardiff is hosting the 38th British Topology Meeting from 9th - 11th September 2025. The registration is now open! Come along if you are looking for some interesting talks about all things topological. Details can be found here:
sites.google.com/view/btm38
#MathSky
#topology
#AcademicSky
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38th BTM
The meeting will begin on Tuesday 9th September at 13:00 and will close around noon on Thursday 11th September. All talks will be held in Abacws.
https://sites.google.com/view/btm38
7 months ago
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Ulrich Pennig
Brian Bilston
7 months ago
Thanks to all the lovely people at the Burnley Mechanics last night. What a fab evening. Here’s a pic of Henry Normal doing his stuff. We’re off to St Albans today for the penultimate show of the tour. Tickets still available. Hope to see some of you there.
everyonetheatres.com/book/?instan...
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Ulrich Pennig
Cardiff University Libraries
7 months ago
Cardiff Uni academics of Bluesky! We'd be grateful if you'd share 🙏. We are really looking forward to hearing your memories of our brutalist beacon on campus!
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Florian Foos
7 months ago
Irresponsible policy and at the worst possible time for universities in the UK. I’m still waiting for as much as a concept of a plan from this government for HE.
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Ulrich Pennig
🇨🇦 Zoë Keating
7 months ago
Apple nerds, I need help! For years I’ve used AppleScripts to tell Ableton Live to save so that I can open a new file with a midi command. That stopped working when I upgraded to OS 14.7. When I test my ancient scripts I get a new error that ScriptEditor can’t send keystrokes. Anyone know the fix?
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Annette Dittert
7 months ago
Hard to say how disappointing this morning‘s speech really was. Morally AND intellectually. Agree with every line here by
@iandunt.bsky.social
👇
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Starmer is as bad as those who came before him. What a bitter disappointment
Echoing the far right on immigration, his moral and intellectual stature has fallen away
https://inews.co.uk/opinion/starmer-is-as-bad-as-those-who-came-before-him-what-a-bitter-disappointment-3688849
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London Mathematical Society
7 months ago
Today is
#May12
, a worldwide celebration of women in mathematics, marking the birthday of Maryam Mirzakhani, who passed away at the age of 40. Dozens of events are taking place all across the world ➡️
may12.womeninmaths.org
#WomenInMaths
#May12
#May12WIM
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Quanta Magazine
8 months ago
The mathematician Zhouli Xu was warned against trying to resolve the Kervaire conjecture while in graduate school. But the problem remained “a constant source of fascination,” he said.
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Dimension 126 Contains Strangely Twisted Shapes, Mathematicians Prove | Quanta Magazine
A new proof represents the culmination of a 65-year-old story about anomalous shapes in special dimensions.
https://www.quantamagazine.org/dimension-126-contains-strangely-twisted-shapes-mathematicians-prove-20250505/
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From Tuesday, 6th May to Wednesday, 7th May 2025 Cardiff will host the Bremen-Cardiff workshop on Combinatorial Topology, Discrete Geometry and their application to Data Science. This is a collaboration with the University of Bremen in Germany.
sites.google.com/view/bremen-...
8 months ago
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Ulrich Pennig
Gail Myerscough
10 months ago
Hello! It doesn’t cost anything to repost but it helps me spread the word about my small business. My online shop is full of bold & colourful prints, homewares and cards. I’m also available for freelance design work and art licensing.
gailmyerscough.co.uk
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