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Sune Lehmann

@sunelehmann.com

977 followers 165 following 50 posts

Your friendly neighborhood suneman

Posts Replies Media

Sune Lehmann @sunelehmann.com · 30/07/2026

Too Lazy to Read the Paper just passed 10,000 downloads (17,873 if we count YouTube). Not bad for unedited, hour-long conversations with my favorite scientists. The whole story, including both season trailers – one features me on a ukulele: sunelehmann.com/blog/too-laz...

Computer generated image that advertises the blog post with random stats and vague science-y imagery

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Sune Lehmann @sunelehmann.com · 12/05/2026

Hey people of Amsterdam! I'll be in town May 19–20 for the IAS Festival 2026 with two talks back-to-back: a Tuesday-evening public lecture (with cocktails and live music) and a Wednesday-morning academic reflecting on "laws of human behavior" is even a thing. Details

ChatGPT illustration of life-paths for talk 1, with a mini Denmark on the left and a network on the right.

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Sune Lehmann @sunelehmann.com · 18/12/2025

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Sune Lehmann @sunelehmann.com · 18/12/2025

Parish-level voting for "socialdemokratiet"

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Sune Lehmann @sunelehmann.com · 04/09/2025

There's much more awesomeness in the paper: We go deep on the pairwise distance distribution. And along the way, we model the distribution of houses in Denmark using old-school statistical physics and then connect everything through considering the inter/intra city mobility.

A large and unusually complex figure from the paper.

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Sune Lehmann @sunelehmann.com · 04/09/2025

The 1/x power-law spans the scales of meters to hundreds of km. The way we unearth the power law is that in considering the raw mobility data (orange line), we account for the moves that are possible (blue line) encoded as the distribution of pairwise distances between locations.

Two distributions. One is orange and represents the distribution of empirical moves between houses in Denmark. The other is blue and represents the distribution of pairwise distances between houses in Denmark.

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Sune Lehmann @sunelehmann.com · 04/09/2025

Super excited about our new paper on mobility that's out in Nature Human Behavior www.nature.com/articles/s41... I love this paper for many reasons, but one is that we find beautiful 1/x power-law that spans 6 orders of magnitude hidden within the "ugly" distribution raw mobility data.

A very straight line on a loglog plot. So straight that even Aaron Clauset would call this a power-law

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Sune Lehmann @sunelehmann.com · 01/04/2025

Image of an abstract with the following text

Abstract: A year ago, ChatGPT surprised the world with its extraordinary language generation capabilities. Chatbots have since become of the fastest adopted consumer product in history with investments in genAI forecasted to reach $12B this year. In this talk, I will first review the fast-evolvingliterature on the document-level membership inference task for LLMs: the methods proposed to detect--a posteriori--whether a specific piece of text was seen during training by an LLM and at least partially memorized, the distribution shift concerns, and some of the solutions proposed. I will then discuss the use of randomized controlled setups to causally study LLM memorization. In particular, Iwill discuss how randomized controlled setup have shed lights on the determinant of memorization and showed LLMs to have a mosaic memory. I will conclude the talks with same thoughts on the security and privacy challenges ahead when it comes to LLMs and the use of synthetically generated trap sequences for membership inference.

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Sune Lehmann @sunelehmann.com · 17/12/2024

One of the key reasons to use entropy in scientific work apparently already expressed by von Neumann. From www.quantamagazine.org/what-is-entr...

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Sune Lehmann @sunelehmann.com · 20/11/2024

The video is actually 1:30, but bsky only allows 1 min, so below are the last 30 secs. It's mostly Nietzsche and IMHO the best part.

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Sune Lehmann @sunelehmann.com · 20/11/2024

I teach a network science class where students create a short video to present their final project. This one blew my mind and restored my faith in humanity! (I recommend watching with sound on!)

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