Dirk Lorenz

The potato meme: A picture of a baked potato with the text "Let the potato rest for five minutes"

"me rest for a little longer" maybe?

Curious! Could you elaborate a bit on the way Sturmfels does math collaborations?

Truly an outstanding achievement!

A dark blue celebratory graphic marking the 5-year anniversary of Her Maths Story. The HMS logo appears at the top. Large white text reads “5 years” in the centre, surrounded by yellow star shapes. Additional text highlights milestones: 99 contributors, 200K website visitors, 194 countries reached via the website, and 4.9K followers across social media platforms.

5 years ago today, Her Maths Story went live with our 1st story. What started as a small idea has grown into a global, supportive community celebrating #WomenInMaths. We’re deeply grateful to everyone who has shared, read, supported & believed in this journey. Here’s to the stories still to come 💛✨

Is this even possible administration-wise? Where I am the administration needs at least six weeks between agreement and signature of the contract...

Universidad Técnica Federico Santa María in Valparaiso has a quite iconic campus tbh

In hindsight: The chance that I learned that view some time in the past is fairly high. But when I read that post, it felt like learning something new!

I've been doing math for some decades now and I never realized until today that the number to arrange n things is n! because it is n times 'number of ways to arrange n-1 things', since there are n places where to put it.

Only thought about it as "n places for the first thing, n-1 for the second…"

Another periodic pattern with holes made of aperiodic tiles

These tiles don't cease to amaze - with hexagonal holes you get a lot of symmetry!

And they mix!

🧮
#mathsky

And another one!

Comic. [Banner: Mathematical Society: 2025 Meeting.] PERSON 1 with bun: Any other new developments from the year to cover before we wrap? PERSON 2: Oh, the teens picked a new funny number. PERSON 3 with short hair: Aww, I’m glad to hear they’re still doing that. PERSON 4 with ponytail: I’ll add it to the list. [List: 23 (skidoo!; 42; 69; 420; 1,337; 58,008; [circled]: 67]

Funny Numbers

xkcd.com/3184/

A periodic pattern out of Einstein monotiles (with hexagonal holes)

New periodic pattern from aperiodic tiles dropped:

🧮
#mathsky

Does anyone have a links to good writing on what "trivial" means in mathematics? How we might define that type of thing?

I get why people don't like the term, I want to help students seek out trivial examples/results as a way of getting familiar with whatever property we're working with.
#MathSky

IMO "trivial" should only be used (especially in teaching) when it is defined like in "trivial subspace" is {0}, "trivial linear combination" is the one with all zeros. In all other cases use a different word.

Two possible downsides:

You pay 100$ to get your paper rejected by some reviewer who did not put in the effort.

People accept reviews just to get the compensation.

The second one makes the first one even more probable.

New paper out! Together with my postdoc advisors @esoubies.bsky.social and Cédric Févotte :)

We study the optimization landscape of L0-Bregman relaxations, which naturally arise when one optimizes non-quadratic fidelity terms coupled with the L0-norm.

1/n

Oh, interesting! May I ask: Isn't this view similar to the spirit of performance estimation where one also uses interpolation conditions which then encode points and gradients?

New on arXiv: Why noise matters in learned regularization!
Data-driven regularizers fail without noise structure. 🎯
Tikhonov, Lavrentiev, quadratic — not equal under non-white noise.
🤫 Spoiler: Optimal reconstruction needs proper noise modeling.
👉 Regularizer choice = structure and noise.

Kochendes Wasser in größeren Mengen und länger schrubben ist auch das einzige was ich kenne.

What does it mean to do mathematics?
Read my personal answer here:

web.mathi.uni-heidelberg.de/content/uplo...

#mathsky #math #question

I wasn't talking about this guy! He definitely knows, but is just as annoyed as I am by badly chosen definitions

So you agree that the sine function is not decreasing, but you won't say that it's non-decreasing? But alas math has such a precise language! 🧮

That's the first time I hear it like that!

What would be the difference between increasing and monotonically increasing?

I also never got this. I if would be in charge of naming things, it would be positive for ≥0 and strictly positive for >0 and same for increasing and strictly increasing.

An embroidery in a circular hoop of the Lorentz Strange Attractor. Embroidered using backstitch and variegated thread of colors aqua, indigo, and pink. The pattern loops around giving a two lobed appearance of a butterfly.

Ta daaa! I give you the Lorentz Attractor thanks to the free pattern from #ThreadedTheorems and also @samjshah.bsky.social whose posted work I admired.

#StemBroidery #MathArt #MathSky