Unpopular opinion: The 3x+1 Conjecture might be False! Here's why I think this may be the case. (thread) My first paper, with Y. Sinai in 2002, arxiv.org/abs/math/06016… proves that 3x+1 paths are a geometric Brownian motion (in a precise asymptotic sense), with drift log 3/4 < 0

#AdventOfCode

ICDCIT 2025: Final call for participation. Two updates: 1. Detailed schedule available: icdcit.kiit.ac.in/wp-content/upl… 2. Extended last registration date: Jan 8th, 2025 Website: icdcit.kiit.ac.in Conference dates: Jan 8-11, 2025

What is a chess piece, mathematically? I posted an answer to this question some years back on MathOverflow at mathoverflow.net/a/287927/1946.

It's already 25 years since Y2K. And only 13 years until this: en.wikipedia.org/wiki/Year_2038…

Näin tiede asetetaan poliittiseen kontrolliin. "Akatemian tehtävien hoitaminen ei saa olla ristiriidassa Suomen kansallisen turvallisuuden, Suomen kansainvälisten velvoitteiden tai Suomen ulko- ja turvallisuuspolitiikan kanssa." suomenkuvalehti.fi/mielipide/kuka…

Useless facts about 2025: -it is the sum of the first 9 cubes -it is the number of spanning trees in K₃,₅ -2²⁰²⁵ is an apocalyptic number, which means its digits contain 666 as a substring -this circle contains 2025 squares

🥇Call for Nominations: The Salomaa Prize in Automata Theory, Formal Languages, and Related Topics. For all further information, see the guidelines on the Salomaa Prize website: math.utu.fi/salomaaprize/

BSc or MSc degree student, come to work with us on summer 2025. The application form will be open from January 7th to January 31st 2025. Choose your topic and apply! aalto.fi/en/department-…