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Recent Posts
 Peter Cameron: Doing research
 To cheer you up in difficult times 18: Beautiful drawings by Neta Kalai for my book: “Gina Says”
 Amazing: Simpler and more general proofs for the gtheorem by Stavros Argyrios Papadakis and Vasiliki Petrotou, and by Karim Adiprasito, Stavros Argyrios Papadakis, and Vasiliki Petrotou.
 Igor Pak: What if they are all wrong?
 To cheer you up in difficult times 17: Amazing! The ErdősFaberLovász conjecture (for large n) was proved by Dong Yeap Kang, Tom Kelly, Daniela Kühn, Abhishek Methuku, and Deryk Osthus!
 Open problem session of HUJICOMBSEM: Problem #5, Gil Kalai – the 3ᵈ problem
 To cheer you up in difficult times 16: Optimism, two quotes
 The Argument Against Quantum Computers – A Very Short Introduction
 Open problem session of HUJICOMBSEM: Problem #4, Eitan Bachmat: Weighted Statistics for Permutations
Top Posts & Pages
 Peter Cameron: Doing research
 TYI 30: Expected number of Dice throws
 Amazing: Simpler and more general proofs for the gtheorem by Stavros Argyrios Papadakis and Vasiliki Petrotou, and by Karim Adiprasito, Stavros Argyrios Papadakis, and Vasiliki Petrotou.
 Answer: Lord Kelvin, The Age of the Earth, and the Age of the Sun
 Igor Pak: What if they are all wrong?
 Chomskian Linguistics
 The Argument Against Quantum Computers  A Very Short Introduction
 To cheer you up in difficult times 18: Beautiful drawings by Neta Kalai for my book: "Gina Says"
 Dan Romik on the Riemann zeta function
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Monthly Archives: July 2019
TYI 39 : Can a coalition of children guarantees all being in the same class?
There is a class of children that have just finished elementary school. Now they all move from elementary school to high school and classes are reshuffled. Each child lists three friends, and the assignment of children into classes ensures that … Continue reading
Posted in Combinatorics, Economics, Mathematics to the rescue, Test your intuition
Tagged Test your intuition
3 Comments
Matan Harel, Frank Mousset, and Wojciech Samotij and the “the infamous upper tail” problem
Let me report today on a major breakthrough in random graph theory and probabilistic combinatorics. Congratulations to Matan, Frank, and Vojtek! Artist: Heidi Buck. “Catch a Dragon by the Tail 2” ( source ) Upper tails via high moments and entropic … Continue reading
Isabella Novik and Hailun Zheng: Neighborly centrally symmetric spheres exist in all dimensions!
A tweetlong summary: The cyclic polytope is wonderful and whenever we construct an analogous object we are happy. Examples: Neighborly cubic polytopes; The amplituhedron; and as of last week, the NovikZheng new construction of neighborly centrally symmetric spheres! At last: … Continue reading
Dan Romik on the Riemann zeta function
This post, about the Riemann zeta function, which is among the most important and mysterious mathematical objects was kindly written by Dan Romik. It is related to his paper Orthogonal polynomial expansions for the Riemann xi function, that we mentioned … Continue reading
Posted in Combinatorics, Guest blogger, Number theory
Tagged Dan Romik, George Polya, Paul Turan, Riemann Hypothesis, Riemann zeta function
2 Comments
Itai Benjamini and Jeremie Brieussel: Noise Sensitivity Meets Group Theory
The final version of my ICM 2018 paper Three puzzles on mathematics computation and games has been available for some time. (This proceedings’ version, unlike the arXived version has a full list of references.) In this post I would like to … Continue reading
Posted in Algebra, Combinatorics, Probability
Tagged Itai Benjamini, Jeremie Brieussel, Noisesensitivity
1 Comment
Amazing: Hao Huang Proved the Sensitivity Conjecture!
Today’s arXived amazing paper by Hao Huang Induced subgraphs of hypercubes and a proof of the Sensitivity Conjecture Contains an amazingly short and beautiful proof of a famous open problem from the theory of computing – the sensitivity conjecture posed … Continue reading
Posted in Combinatorics, Computer Science and Optimization
Tagged Hao Huang, sensitivity conjecture
24 Comments