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 Ringel Conjecture, Solved! Congratulations to Richard Montgomery, Alexey Pokrovskiy, and Benny Sudakov
 Test your intuition 43: Distribution According to Areas in Top Departments.
 Two talks at HUJI: on the “infamous lower tail” and TOMORROW on recent advances in combinatorics
 Amazing: Zhengfeng Ji, Anand Natarajan, Thomas Vidick, John Wright, and Henry Yuen proved that MIP* = RE and thus disproved Connes 1976 Embedding Conjecture, and provided a negative answer to Tsirelson’s problem.
 Do Not Miss: Abel in Jerusalem, Sunday, January 12, 2020
 The BrownErdősSós 1973 Conjecture
 Tomorrow: Boolean functions day at the TAU theory fest
 The Google Quantum Supremacy Demo and the Jerusalem HQCA debate.
 Four Great Numberphile Graph Theory Videos
Top Posts & Pages
 Ringel Conjecture, Solved! Congratulations to Richard Montgomery, Alexey Pokrovskiy, and Benny Sudakov
 Test your intuition 43: Distribution According to Areas in Top Departments.
 Amazing: Zhengfeng Ji, Anand Natarajan, Thomas Vidick, John Wright, and Henry Yuen proved that MIP* = RE and thus disproved Connes 1976 Embedding Conjecture, and provided a negative answer to Tsirelson's problem.
 TYI 30: Expected number of Dice throws
 Amazing: Peter Keevash Constructed General Steiner Systems and Designs
 R(5,5) ≤ 48
 A sensation in the morning news  Yaroslav Shitov: Counterexamples to Hedetniemi's conjecture.
 Answer: Lord Kelvin, The Age of the Earth, and the Age of the Sun
 Elchanan Mossel's Amazing Dice Paradox (your answers to TYI 30)
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Category Archives: Geometry
Do Not Miss: Abel in Jerusalem, Sunday, January 12, 2020
From left: Christopher Hacon, Claire Voisin, Ulrike Tillmann, François Labourie Update: This was a great event with four great inspiring talks. Abel in Jerusalem, January 12, 2020 The Einstein Institute of mathematics is happy to host the Abel in Jerusalem Conference “Abel in … Continue reading
Posted in Algebra, Conferences, Geometry
Tagged Christopher Hacon, Claire Voisin, François Labourie, Ulrike Tillmann
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Gil Bor, Luis HernándezLamoneda, Valentín JiménezDesantiago, and Luis MontejanoPeimbert: On the isometric conjecture of Banach
Stefan Banach and one of his famous quotes. Is it really true? A commentator (troll?) named Gina tried to challenge it in a heated discussion over the nCategory cafe. This post briefly describes a May 2019 paper On the isometric conjecture … Continue reading
Abel in Jerusalem – SUNDAY, January 12, 2020, and other events
Update: Boris Solomyak’s birthday conference (January 1314, BarIlan University)is now added. I would like to report on seven eight nine ten mathematical events taking place in Jerusalem, the Tel Aviv area, and Haifa in the next few weeks. (Probably I … Continue reading
Old lecture notes by Alex Zabrodsky
The next post will announce several mathematical events taking place in the next few weeks in Israel. One of these events is the Zabrodsky lectures at the Hebrew University of Jerusalem, that are given this year by Paul Seidel, starting … Continue reading
Starting today: Kazhdan Sunday seminar: “Computation, quantumness, symplectic geometry, and information”
Sunday, 27 October, 2019 – 14:00 to 16:00 Repeats every week every Sunday until Sat Feb 01 2020 Location: Ross 70 See also: Seminar announcement; previous post Symplectic Geometry, Quantization, and Quantum Noise. The Google supremacy claims are discussed (with … Continue reading
Alef’s corner: Bicycles and the Art of Planar Random Maps
The artist behind Alef’s corner has a few mathematical designs and here are two new ones. (See Alef’s website offering over 100 Tshirt designs.) which was used for the official Tshirt for JeanFrançois Le Gall’s birthday conference. See also … Continue reading
Mohammad Ghomi and Joel Spruck settled the CartanHadamard conjecture!
Greetings from Oberwolfach from a great conference on algebraic, geometric, and topological combinatorics. Stay tuned for more pictures and updates from Oberwolfach and CERN, and also in case you did not see it already here is the link to the … Continue reading
Posted in Geometry, Uncategorized
Tagged CartanHadamard's conjecture, Joel Spruck, Mohammad Ghomi, Oberwolfach
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Karim Adiprasito: The gConjecture for Vertex Decomposible Spheres
J Scott Provan (site) The following post was kindly contributed by Karim Adiprasito. (Here is the link to Karim’s paper.) Update: See Karim’s comment on the needed ideas for extend the proof to the general case. See also in the … Continue reading
Posted in Combinatorics, Convex polytopes, Geometry, Guest blogger
Tagged gconjecture, J Scott Provan, Karim Adiprasito, Leonid Gurvits, Lou Billera
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Henry Cohn, Abhinav Kumar, Stephen D. Miller, Danylo Radchenko, and Maryna Viazovska: Universal optimality of the E8 and Leech lattices and interpolation formulas
Henry Cohn A follow up paper on the tight bounds for sphere packings in eight and 24 dimensions. (Thanks, again, Steve, for letting me know.) For the 2016 breakthroughs see this post, this post of John Baez, this article by Erica Klarreich on … Continue reading