Trending
Martin Keller-Ressel's Avatar

Martin Keller-Ressel

@mkellerressel

Professor at TU Dresden | Stochastics/Probability, Financial Mathematics, Networks, Hyperbolic Geometry

81
Followers
479
Following
8
Posts
18.02.2024
Joined
Posts Following

Latest posts by Martin Keller-Ressel @mkellerressel

Post image

During Fiona Hill's testimony to Congress on Oct 14, 2019, she described how Trump and Putin discussed exchanging Ukraine for Venezuela. The quid pro quo was if Trump refuses to help Ukraine fight off a Russian invasion, Putin would not help Venezuela (a Russian ally) resist a US takeover.

04.01.2026 02:35 ๐Ÿ‘ 5947 ๐Ÿ” 3798 ๐Ÿ’ฌ 172 ๐Ÿ“Œ 506

Wenn er echt ist, ist der Werbespruch genial.

31.03.2025 10:34 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
We calculated pi with colliding blocks
We calculated pi with colliding blocks YouTube video by Stand-up Maths

Happy ฯ€ Day everyone! This year we collided some masses together.

In practise: youtu.be/vlUTlbZT4ig
And in theory: youtu.be/6dTyOl1fmDo

14.03.2025 10:39 ๐Ÿ‘ 152 ๐Ÿ” 25 ๐Ÿ’ฌ 6 ๐Ÿ“Œ 1
Post image

NEW: The actions of Trump and Vance in recent weeks highlight something under-appreciated.

The American right is now ideologically closer to countries like Russia, Turkey and in some senses China, than to the rest of the west (even the conservative west).

My column: www.ft.com/content/3046...

07.03.2025 09:58 ๐Ÿ‘ 3915 ๐Ÿ” 1769 ๐Ÿ’ฌ 126 ๐Ÿ“Œ 226
Post image

There is no act of censorship more explicit than literally banning words.

The Trump administration is requiring federal agencies to remove all references to โ€œgender,โ€ โ€œdiversityโ€ and โ€œinclusionโ€ from federal documents.

06.02.2025 00:41 ๐Ÿ‘ 314 ๐Ÿ” 148 ๐Ÿ’ฌ 16 ๐Ÿ“Œ 15

๐Ÿงช
If I were Canadian PM I would immediately:

1. Create a new $15B science fund

2. Offer any credentialed US scientist funding for lab startup and replacement of NIH grants if they move to Canada

3. Immediate permanent residency

4. Citizenship after 2 years

Overnight a science superpower

31.01.2025 22:04 ๐Ÿ‘ 41139 ๐Ÿ” 7001 ๐Ÿ’ฌ 1243 ๐Ÿ“Œ 680

Europe ๐Ÿ‡ช๐Ÿ‡บ โ€ฆ Go for it!

And please add DEI just because โ€ฆ

01.02.2025 16:09 ๐Ÿ‘ 27 ๐Ÿ” 4 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Post image

Every year, the World Economic Forum at Davos reports on the consensus of risks facing the world.

In the short-term, it's DISINFORMATION.

Long-term, it's CLIMATE CHANGE.

And, guess what, they're linked!

24.01.2025 01:36 ๐Ÿ‘ 644 ๐Ÿ” 271 ๐Ÿ’ฌ 28 ๐Ÿ“Œ 15

Ein paar Gedanken zur Amtseinfรผhrung und den letzten 24 Stunden: Trumps 3 Reden markieren einen historischen Bruch. Schon seine erste Rede, die offizielle Inaugurations-Rede, war eine so nie dagewesene Verhรถhnung des anwesenden politischen Gegners.

21.01.2025 19:13 ๐Ÿ‘ 1393 ๐Ÿ” 487 ๐Ÿ’ฌ 27 ๐Ÿ“Œ 32

Stimme vรถllig zu. Und es gibt genรผgend europรคische Wissenschaftler in den USA, denen man genau jetzt ein attraktives Rรผckkehrangebot machen sollte. Das gleiche gilt fรผr die Start-Up-Szene im Silicon Valley.

21.01.2025 10:22 ๐Ÿ‘ 14 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Post image Post image

Wir wollen von Medien nicht schlecht behandelt werden, schreibt FPร–-Mediensprecher Christian Hafenecker.

Wir werden Medien schlecht behandeln, schreibt FPร–-Vizebรผrgermeister Dominik Nepp.

15.01.2025 06:34 ๐Ÿ‘ 449 ๐Ÿ” 101 ๐Ÿ’ฌ 14 ๐Ÿ“Œ 7
Disintegration theorem - Wikipedia

The Disintegration Theorem is already a result of measure theory en.wikipedia.org/wiki/Disinte...

05.01.2025 16:24 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

A List of Predictions Made in 1925 About 2025

๐Ÿงต

01.01.2025 20:55 ๐Ÿ‘ 1043 ๐Ÿ” 600 ๐Ÿ’ฌ 32 ๐Ÿ“Œ 69

๐Ÿ’ก These bounds enables us to quantify the interplay between optimisation hyperparameters and the tail-index. Doing so, we contribute to the ongoing discussion on links between heavy tails and the generalization performance of neural networks.

Find our paper here: openreview.net/pdf?id=EFrgB...

06.12.2024 10:03 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0


๐Ÿ’ป We give explicit upper and lower bounds on the tail-index of the resulting parameter distribution and validate these bounds in numerical experiments.

06.12.2024 10:03 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

๐Ÿงฎ In our paper, we analyze a continuous diffusion approximation of SGD and show mathematically (in a regularized linear regression framework) that it leads to an asymptotically heavy-tailed parameter distribution, even though local gradient noise is Gaussian.

06.12.2024 10:03 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0


TL;DR: Heavy tailed parameter distributions can emerge from locally Gaussian gradient noise, as we show both theoretically and empirically.

It has repeatedly been observed that loss minimization by stochastic gradient descent (SGD) leads to heavy-tailed distributions of neural network parameters.

06.12.2024 10:03 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

On my way to represent ScaDS.AI Dresden/Leipzig at #NeurIPS2024 and to present a poster on joint work with Zhe Jiao on "Emergence of Heavy Tails in Homogenized Stochastic Gradient Descent"

06.12.2024 10:03 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Post image

This CD player was my birthday present in 1997 along with the incomparable Fresh Hits 1997. I found it recently and COULD NOT BELIEVE how rich the sound was, after years of streaming Spotify on my phone. My column today is about this phenomenon, which Iโ€™m calling โ€œqualitynesiaโ€ on.ft.com/3ZlwHf5

03.12.2024 09:18 ๐Ÿ‘ 2736 ๐Ÿ” 410 ๐Ÿ’ฌ 253 ๐Ÿ“Œ 184
Preview
Wiener weniger unfreundlich Das Image der Wiener Bevรถlkerung, besonders unfreundlich zu sein, hat sich leicht verbessert. Im vergangenen Jahr noch auf dem letzten Platz von 53 internationalen Stรคdten, liegt Wien in Sachen Freund...

Wieder einen Spitzenplatz verloren

22.11.2024 07:37 ๐Ÿ‘ 105 ๐Ÿ” 9 ๐Ÿ’ฌ 13 ๐Ÿ“Œ 5
Preview
Like โ€˜old Twitterโ€™: The scientific community finds a new home on Bluesky After recent changes to Elon Muskโ€™s X, a gradual migration turns into a stampede

Nice! @kakape.bsky.social

21.11.2024 12:03 ๐Ÿ‘ 95 ๐Ÿ” 18 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1
Preview
Doch nichts mit blauem Himmel? Elon Musk bejubelt Donald Trumps Wahlsieg, und der groรŸe Abgang von seiner toxischen Plattform ist in vollem Gange, flugs rรผber zur netten Alternative Bluesky. Aber kรถnnen wir es uns leisten, unsere F...

I wrote a thing for @fm4.bsky.social about how it's just not good enough to run for the next best platform in the face of fascism. Auf Deutsch.

fm4.orf.at/stories/3044...

14.11.2024 17:43 ๐Ÿ‘ 23 ๐Ÿ” 9 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 5
Post image

โ€œIโ€™ve noticed Iโ€™m not in your starter pack. Any particular reason for that?โ€

17.11.2024 11:34 ๐Ÿ‘ 7413 ๐Ÿ” 1072 ๐Ÿ’ฌ 107 ๐Ÿ“Œ 94
Preview
All - Bluesky Directory A curated collection of all things relating to the Blue Sky social media platform.

Inzwischen gibt es mehr als 8.000 โ€žStarterpacksโ€œ auf #Bluesky. Starterpacks sind kuratierte Listen von Accounts, denen man mit einem Klick folgen kann. Ihr kรถnnt die 8.000 Starterpacks hier nach Begriffen wie Politik, Journalismus, Geschichte etc. durchsuchen:

13.11.2024 17:50 ๐Ÿ‘ 34 ๐Ÿ” 20 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 4
Image of The Guardianโ€™s company logo.

Image of The Guardianโ€™s company logo.

Image of Twitter/Xโ€™s logo.

Image of Twitter/Xโ€™s logo.

The Guardian has announced they are archiving their Twitter/X account:

โ€œWe think that the benefits of being on X are now outweighed by the negatives and that resources could be better used promoting our journalism elsewhere.โ€

13.11.2024 11:53 ๐Ÿ‘ 1675 ๐Ÿ” 190 ๐Ÿ’ฌ 16 ๐Ÿ“Œ 61