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 Past and Future Events
 Joshua Hinman proved Bárány’s conjecture on face numbers of polytopes, and Lei Xue proved a lower bound conjecture by Grünbaum.
 Amazing: Jinyoung Park and Huy Tuan Pham settled the expectation threshold conjecture!
 Combinatorial Convexity: A Wonderful New Book by Imre Bárány
 Chaim EvenZohar, Tsviqa Lakrec, and Ran Tessler present: The Amplituhedron BCFW Triangulation
 Ehud Friedgut: How many cubes of 2×2×2 fit into a box of size 8×4×3? (TYI 49)
 Is HQCA Possible? A conversation with Michael Brooks
 To cheer you up in difficult times 35 combined with Test Your Intuition 48: Alef’s corner – Jazz and Math
 Reflections: On the Occasion of Ron Adin’s and Yuval Roichman’s Birthdays, and FPSAC 2021
Top Posts & Pages
 Amazing: Jinyoung Park and Huy Tuan Pham settled the expectation threshold conjecture!
 Joshua Hinman proved Bárány's conjecture on face numbers of polytopes, and Lei Xue proved a lower bound conjecture by Grünbaum.
 TYI 30: Expected number of Dice throws
 Game Theory 2021
 Greatest Hits
 Telling a Simple Polytope From its Graph
 Bálint Virág: Random matrices for Russ
 Past and Future Events
 Answer: Lord Kelvin, The Age of the Earth, and the Age of the Sun
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Monthly Archives: January 2018
The Semester Break activities of the High Dimensional Combinatorics and Expanders Special Year
UPDATE: Schedule change! An additional workshop On February 5 and shift in dats of the others. Here is the calendar We have now at HUJI a semester break, but the special semester in High dimensional combinatorics and IIAS leaded by … Continue reading
Akshay Venkatesh Lectures at HUJI – Ostrowski’s Prize Celebration, January 24&25
Thursday January 25, 14:1515:45 Ostrowski’s prize ceremony and Akshay Venkatesh’s prize lecture: Period maps and Diophantine problems Followed by a Basic notion lecture by Frank Calegary 16:3017:45: The cohomology of arithmetic groups and Langlands program Wednesday January 24, 18:0017:00: Akshay Venkatesh … Continue reading
Hardness of Approximating Vertex Cover, PolytopeIntegralityGap, the AlswedeKachatrian theorem, and More.
Lior Silberman asked about applications of the 2to2 game theorem to hardness of approximation, and James Lee answered mentioning applications to vertex cover. Let me elaborate a little on vertex cover, and other matters. (Here is the pervious post on … Continue reading
Jacob Fox, David Conlon, and Benny Sudakov: Vast Improvement of our Knowledge on Unavoidable Patterns in Words
I heard a lecture by Benny Sudakov on the remarkable paper Towertype bounds for unavoidable patterns in words, by David Conlon, Jacob Fox, and Benny Sudakov. Here are the slides, and let me let the slides speak for themselves. The problem
Subhash Khot, Dor Minzer and Muli Safra completed the proof of the 2to2 Games Conjecture
Update: A related blog post by Boaz Barak: Unique Games Conjecture – halfway there? The 2to2 Games Conjecture is a somewhat weaker form of Khot’s unique game conjecture. The paper is: Pseudorandom Sets in Grassmann Graph have NearPerfect Expansion by Subhash Khot, Dor … Continue reading
Posted in Combinatorics, Computer Science and Optimization, Updates
Tagged Dor Minzer, Muli Safra, Subhash Khot
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Interesting Times in Mathematics: Enumeration Without Numbers, Group Theory Without Groups.
Lie Theory without Groups: Enumerative Geometry and Quantization of Symplectic Resolutions Our 21th Midrasha (school) IIAS, January 7 – January 12, 2018 Jerusalem Enumerative Geometry Beyond Numbers MSRI, January 16, 2018 to May 25, 2018 Abstract for the Midrasha
Posted in Algebra, Combinatorics, Geometry, Updates
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Cody Murray and Ryan Williams’ new ACC breakthrough: Updates from Oded Goldreich’s Choices
Thanks to Irit Dinur for telling me about the following: Oded Goldreich’s recent choice is about the paper: Circuit Lower Bounds for Nondeterministic QuasiPolytime: An Easy Witness Lemma for NP and NQP, by Corry Murray and Ryan Williams. Ryan Williams … Continue reading
Posted in Combinatorics, Computer Science and Optimization, Updates
Tagged Circuit complexity, Cody Murray, Ryan Williams
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Yael Tauman Kalai’s ICM2018 Paper, My Paper, and Cryptography
Yael Tauman Kalai: Delegating Computation via NoSignaling Strategies. Ladies and Gentelmen, Here is, exclusively for our readers, Yael Tauman Kalai’s ICM2018 paper: Delegating Computation via NoSignaling Strategies. The opportunity to present the paper arose when a week ago I attended … Continue reading
Posted in Combinatorics, Computer Science and Optimization
Tagged cryptography, ICM2018, Yael Kalai
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