iiinova — where your digital self keeps evolving

Reposted by Philipp Birken

Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 15h

The dump of 722 preprints on github by OpenAI on solutions to open mathematical problems does not mention numerical analysis. Nevertheless, there is one that is of relevance, namely about the complexity of matrix-matrix multiplications of square matrices. The preprint claims to prove that this […]

fediscience.org

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 15h

Be that as it may, even if we are being trolled, a troll can have a valid point and it looks like a piece of serious research on a problem that is of relevance. Going on from here, I can well imagine that mathematics will be more useful, since more people will be able to make use of high level […]

fediscience.org

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 15h

So now, OpenAI says that have an upper bound for the complexity of O(n^2.25). This is certainly progress. They also do not provide an algorithm. So it changes exactly nothing in practice. I looked at the article. Textwise, it is rather typical LLM output, with the occasional meandering sentence […]

fediscience.org

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 15h

However, there’s another point: Strassen also proved that the complexity of computing an inverse is the same. A linear system also has O(n^2) input parameters, but the standard algorithm, Gaussian elimination, needs O(n^3). Nick Trefethen calls this question, if there is an algorithm that solves […]

fediscience.org

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 15h

Why is this important? Well, the standard way of multiplying two square matrices costs O(n^3) operations. However, the matrices have only O(n^2) entries, so there might be an algorithm that does it with that complexity. Since 1969 we know that Strassens algorithm provides a better asymptotic […]

fediscience.org

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 15h

fediscience.org

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Kris @isotopp.infosec.exchange.ap.brid.gy · 23h

finopsllm.com/research/codex-usage-… Wie doll ist eine ChatGPT Subscription subventioniert? $20 pro Monat -> $67 API Usage pro Woche, mit 4.5 Wochen pro Monat sind das also grob Faktor 15 oder 1500%. Sollte man im Kopf behalten, wenn man den Börsengang diskutiert.

Table with four columns: Plan, Price / month, Codex API $ per week, and Basis.

It compares three plans' monthly subscription cost against an estimated weekly spend on Codex API usage.

Row 1: ChatGPT Plus — $20 per month; $67 per week on Codex API; Basis: Measured.

Row 2: ChatGPT Pro 5x — $100 per month; approximately $335 per week on Codex API; Basis: Plus × 5, projected.

Row 3: ChatGPT Pro 20x — $200 per month; approximately $1,340 per week on Codex API; Basis: Plus × 20, projected.

Main takeaway: the Plus tier's weekly API figure is a measured value, while the Pro 5x and Pro 20x weekly figures are projections scaled up from the Plus tier (5× and 20× respectively).

Monthly prices step up from $20 to $100 to $200 across the three plans.

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Reposted by Philipp Birken

Frederik Mallon @freddy.volksverpetzer.de · 02/10/2026

Vielleicht der wichtigste Fakten-Snack diese Woche: Kostenvergleich zwischen D-Ticket, Tankrabatten und anderen Steuervergünstigungen für den individualisierten und Flugverkehr. Grafik von @correctiv.org @sebastianhaupt.bsky.social

Säulendiagramm mit verschiedenen Verkehrssubventionen und wie viel sie kosten (durch Zahlungen oder verminderte Steuereinnahmen):

Deutschland-Ticket: 3 Mrd. Euro
Tank-Rabatt: 4,1 Mrd. Euro (Mai-Juni und Oktober-Dezember addiert)
Dienstwagenprivileg: 4,2 Mrd. Euro
Pendlerpauschale: 5 Mrd. Euro
Dieselprivileg: 7-8 Mrd. Euro
Steuerbefreiung Kerosin: etwa 8 Mrd. Euro

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Reposted by Philipp Birken

Daniel Lakeland @dlakelan.mastodon.sdf.org.ap.brid.gy · 01/10/2026

Fediverse, the social media system for 40+ year old people who built the world wide web and regret it.

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 29/09/2026

@Ruth_Mottram I decided to not write propsals for a few months and focus on getting some of the papers I'm currently involved in to be finished. This is more fun, but somehow it doesn't feel right, which again doesn't feel right...

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Reposted by Philipp Birken

Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 23/09/2026

@TammyKolda and Daniel Appelö (who visited Lund this summer), have crunched the arxiv submission numbers. They are up a massive 40% over all disciplines compared to a year before (august 26 vs august 25), but in math they are up 70%! This rise is mostly in the past few months, correlating with […]

fediscience.org

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Carl Heath @carl.heath.social.ap.brid.gy · 23/09/2026

Ryska attacker förstör böcker, lager och tryckerier. Samtidigt skickar civila böcker till soldater vid fronten, ibland sista biten med drönare. Om kultur, motståndskraft och läsning i krig. carlheath.se/en-bok-nedslappt-med-d…

carlheath.se

En bok nedsläppt med drönare

En av fem texter om Cultural Forces, ett förband inom Ukrainas försvarsmakt där soldaterna arbetar med konst, musik, litteratur och minne. Texterna bygger på ett besök i Kyjiv i september 2026 och…

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 23/09/2026

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Ruth Mottram @ruth-mottram.fediscience.org.ap.brid.gy · 21/09/2026

Good morning all, for those of you who missed it last week, here's the last call on what wordpress informs me is my 💯 th post... We've been measuring the loss of the Greenland and Antarctic ice sheets for half a century now, read on for what we have discovered […]

fediscience.org

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Reposted by Philipp Birken

Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 16/09/2026

@leanderlindahl Fairphone with murena e OS, which you helped me pick and which reminds me to write.a short review abouy how awesome it is. So here it is: Everything works! Very Good camera (not great!)! it's awesome! Only thing I found that does not work: I can not cast to Google Chromecast […]

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 16/09/2026

fediscience.org

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Kris @isotopp.infosec.exchange.ap.brid.gy · 14/09/2026

blog.koehntopp.info/2026/09/14/sie-… Worin wir den "AI Entwicklungsstop und verschobenen OpenAI Börsengang aus Sicherheitsgründen" beleuchten und deutlich machen, daß es nicht um Sicherheit geht, sondern um Geld, den absehbar scheiternden AIaaS-Markt […]

infosec.exchange

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Reposted by Philipp Birken

Kris @isotopp.infosec.exchange.ap.brid.gy · 13/09/2026

Vor vielen Jahren einmal, ich lebte noch in Kiel, gab es in Kiel den Multimedia Campus, MMC. Das war im Grunde gar keine doofe Idee. Man wollte dort Postgrad-Ausbildung machen, in der man Business-Menschen IT beibrachte, und IT-Menschen Business. Ich war mit noch jemandem als Vertreter der […]

infosec.exchange

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Ola Spännar @olaspannar.bsky.social · 12/09/2026

10 klimatbeslut från Tidöregeringen – en påminnelsetråd 🧵 1. Miljödepartementet lades ned Tidöregeringen nedmontering av Sveriges klimat- och miljöpolitik symboliseras kanske tydligast med att det första de gjorde var att stänga Miljödepartementet www.di.se/hallbart-nar...

di.se

Miljödepartementet skrotas – ”förödande konsekvenser”

Ulf Kristerssons nya regering lägger ner miljödepartementet. Istället ska frågorna inordnas under klimat- och näringslivsdepartementet.

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Reposted by Philipp Birken

Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 09/09/2026

As a math professor working in computational fluid dynamics, here a few thoughts on the news about the Millenium problem related to Navier-Stokes. i) I never really understood why this particular question about global regularity of solutions made it into the seven millenium problems. There was […]

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 09/09/2026

@kallekn Exakt. Jag upplever det som kränkande och även invandrarfiendlig, men de som beter sig så tycker att de är hövligt, antar jag, för att de underlättar kommunikationen för mig, även om jag har inte engelska som modersmål heller. Sådant beteende är inte det vanliga, men det händer […]

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 09/09/2026

@kallekn Det är ibland förbluffande, och jag tycker att det är självklart att fastanställda borde lära sig svenska. I deras försvar: Universitetet är en arbetsplats där man kan forska (och oftast undervisa) på engelska. Och det händer mig fortfarande att folk byter till engelska så fort jag […]

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 09/09/2026

iv) And a thought on the whole spying business. We do not know what has been going on, but it is disconcerting that OpenAI has been so cagey and definitely not been trying to act above the fold and instead quite clearly been competing with a customer. Let's say that OpenAI did indeed train […]

fediscience.org

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 09/09/2026

iii) But let's see what "this" is. The reasoning model seems to have two things to do: For one, as a sounding board on ideas. Not sure how useful or critical that was. The major amount of compute seems to have gone into something else, that is to generate functions from interesting numerical […]

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 09/09/2026

ii) It is interesting that a group of mathematicians with a state of the art reasoning model and an unlimited amount of compute can do this. The question about "spying" on Buckmaster and co aside, these people did of course not work in a vacuum and were interacting with the community. 2/

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 09/09/2026

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 09/09/2026

@kallekn Sådant händer mig jämnt. En variant är att folk hör mig prata engelska eller tyska och sedan utgår ifrån att jag kan inte svenska, som om man kan inte prata flera språk.

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Reposted by Philipp Birken

Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 05/09/2026

Humble Bundle has a C J Cherryh book offer. She is one of my favourite authors, very prolific and quite underrated, even given that she won two Hugo awards along time ago. Now, her style is not everybodys. She uses stream of conciousness of the main character and so it is very dialogue heavy […]

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 05/09/2026

fediscience.org

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 05/09/2026

@sorenhave.dk Allison Jenney at her best: "You can't do that!!!"

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Ingmar Rentzhog @ingmar.wsocial.eu · 24/08/2026

The climate majority already exists. The challenge is making it visible. 50,000+ people marched in Stockholm five times more than expected. Scouts, unions, choirs, parents and more. I wrote about why this in @ahallbarhet.bsky.social and how Europe can scale it.

aktuellhallbarhet.se

Ingmar Rentzhog: Receptet från Stockholm – så blir majoriteten synlig för sig själv

Söndagens stora klimatdemonstration i Stockholm samlade ungefär 50 000 människor som höjde sina röster för en starkare klimatpolitik. Ingmar Rentzhog, We don’t have time, delar sina reflektioner från ...

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 24/08/2026

Why travel two days each way to Scotland instead of going by plain? It’s even more expensive, since you have to pay for the hotel on the way! Well, the climate, duh. But it’s worth taking a closer look. When going over land to Scotland from Sweden, you have to take a long detour (4000km), while […]

fediscience.org

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Ingmar Rentzhog @ingmar.wsocial.eu · 23/08/2026

The first job of the climate movement is no longer to create a majority for stronger climate action. That majority already exists. The job now is to introduce the majority to itself. That started in Stockholm on 23 August 2026. Now it spreads across Europe. #DenStoraKlimatDemonstrationen

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 24/08/2026

fediscience.org

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Prof. Sam Lawler @sundogplanets.mastodon.social.ap.brid.gy · 19/08/2026

Wow. "AI adoption raises homework scores by 18% and reduces completion time by 30%, but lowers monthly exam scores by 20% within six months. High-stakes entrance-exam scores fall by 18 and 24%, with the full penalty emerging only after about two years. " […]

mastodon.social

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Strömberg @cs1891.bsky.social · 09/08/2026

Män är ett allvarligt samhällsproblem.

Graf i DN över skillnaden mellan kvinnors (överväldigande oppositionen) och mäns (övervägande regeringsunderlaget) partisympatier.

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 07/08/2026

I thought I'd write down some reflections on long distance train travel: 1) Trains are not reliable, not in sweden, denmark, germany or the UK. 2) Since trains are not reliable, I strongly advise to use an interrail ticket. Without it, any delay causes stress, and that ruins the whole thing. 3) […]

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 07/08/2026

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 07/08/2026

A well written obituary for the founder of MathWorks. I didn't know that the term "embarassingly parallel" originated with him. I've met him a few times and he was a very kind man. www.siam.org/publications/siam-news…

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Søren Have @sorenhave.dk · 01/08/2026

In July 97% of all new cars sold to private consumers in Denmark were EVs. Not HEVs or PHEVs. Pure BEVs. This means that private consumers only bought around 435 new cars with an exhaust pipe. www.dr.dk/nyheder/sene... #dktrp #dkgreen

dr.dk

Rekordmange købte en elbil i juli | Nyheder | DR

Når danskerne køber ny bil, vælger flere og flere at anskaffe sig en, der kører på el.

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Philipp Birken @philippbirken.fediscience.org.ap.brid.gy · 25/07/2026

It's a long ride of six hours, due to planned repairs and such. But we arrive 5 minutes early! And we catch one earlier Öresundståg to Malmö. 31/n

A grey train at a platform at night. A woman with a trolley smiles and points at the open train door.

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