Ioannis Kontoyiannis
@kontoyiannis.bsky.social
1.8K followers 350 following 200 posts
Information theory, probability, statistics. Churchill Professor of Mathematics of Information @UofCambridge: dpmms.cam.ac.uk/person/ik355/ 🧮 #MathSky 🧪 #Science [used to be @yiannis_entropy at the other place]
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kontoyiannis.bsky.social
🚨 Very excited about this!

Among other things, we give the first complete characterization of the case of equality in Shannon's Entropy Power Inequality

Full paper here: arxiv.org/abs/2509.14021
Reposted by Ioannis Kontoyiannis
pnas.org
One of the most-viewed PNAS articles in the last week is “An information-theoretic foreshadowing of mathematicians’ sudden insights.” Explore the article here: www.pnas.org/doi/10.1073/...

For more trending articles, visit ow.ly/Me2U50SkLRZ.
Studying mathematicians’ sudden insights in their natural habitat.
kontoyiannis.bsky.social
Not saying I loved it, but a popular-science introduction to Markov chains that gets nearly 8 million views in six weeks is definitely something to celebrate!
The Strange Math That Predicts (Almost) Anything
YouTube video by Veritasium
www.youtube.com
kontoyiannis.bsky.social
🚨 Is fixed step-size a good idea? A rigorous analysis, in exciting new work with Sean Meyn (@supermeyn.bsky.social) and Caio Kalil Lauand
kontoyiannis.bsky.social
🙋‍♂️❓

When did Google search stop saying how many results it found, and is it still possible to get that info?
kontoyiannis.bsky.social
🚨 New paper -- Causal modeling and the curse of overfitting
Title and abstract of the paper: "Bayesian causal discovery: Posterior concentration and optimal detection", by Valentinian Lungu, Graduate Student Member, IEEE, Joni Shaska, Graduate Student Member, IEEE, Ioannis Kontoyiannis, Fellow, IEEE, Urbashi Mitra, Fellow, IEEE
kontoyiannis.bsky.social
And a gut-wrenching estimated 22,800 children
kontoyiannis.bsky.social
"Almost 84,000 people died in Gaza between October 2023 and early January 2025 as a result of the Hamas–Israel war"

"More than half of the people killed were women aged 18–64, children or people over 65"
nature.com
Nature @nature.com · Jun 27
First independent survey of deaths in Gaza reports more than 80,000 fatalities

The results align with other efforts to count the number of people killed amid the ongoing conflict.

https://go.nature.com/44nH0la
First independent survey of deaths in Gaza reports more than 80,000 fatalities
Results align with other efforts to count the number of people killed amid the ongoing conflict.
go.nature.com
kontoyiannis.bsky.social
New entropy inequalities --

Fun new work with Rupert Li and Lampros Gavalakis just posted www.arxiv.org/abs/2506.20813 !
title and abstract of the paper on the arXiv
kontoyiannis.bsky.social
🚨 Breaking -- and extremely exciting -- news!

It was just announced that Frans Willem was awarded the Shannon Award!

Congratulations, Frans!
kontoyiannis.bsky.social
In auto-reply/vacation messages that say "...if there is something urgent, please contact Blah at blah@blah...", has anyone ever urgently contacted Blah?
kontoyiannis.bsky.social
Is the thesis available online somewhere?
kontoyiannis.bsky.social
This is terrible. An apology would at least be nice. Instead, they are patronizing everyone else: "This should be a learning moment for all journalism organizations".
kontoyiannis.bsky.social
Hard to see how this may not be a problem 😮❗
nytimes.com
During a Senate hearing, Kristi Noem, the homeland security secretary, falsely described habeas corpus as the president’s “constitutional right” to deport people. nyti.ms/3H1DXXS
Reposted by Ioannis Kontoyiannis
stevenstrogatz.com
Obit for Peter Lax, an applied mathematician who did pioneering work in PDEs, solitons, and computational science.

www.nytimes.com/2025/05/16/s...
Peter Lax, Pre-eminent Cold War Mathematician, Dies at 99
www.nytimes.com
kontoyiannis.bsky.social
Exciting talk by Frank den Hollander at the Athens Probability Colloquium

AProC.gr
kontoyiannis.bsky.social
"most of what we write about is humans doing things and other humans being upset about it" 🙃