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- The Trifference Problem
- Greatest Hits 2015-2022, Part II
- Greatest Hits 2015-2022, Part I
- Tel Aviv University Theory Fest is Starting Tomorrow
- Alef’s Corner
- A Nice Example Related to the Frankl Conjecture
- Amazing: Justin Gilmer gave a constant lower bound for the union-closed sets conjecture
- Barnabás Janzer: Rotation inside convex Kakeya sets
- Inaugural address at the Hungarian Academy of Science: The Quantum Computer – A Miracle or Mirage
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- Answer: Lord Kelvin, The Age of the Earth, and the Age of the Sun
- Amazing: Justin Gilmer gave a constant lower bound for the union-closed sets conjecture
- Amazing: Jinyoung Park and Huy Tuan Pham settled the expectation threshold conjecture!
- Quantum Computers: A Brief Assessment of Progress in the Past Decade
- A Nice Example Related to the Frankl Conjecture
- Amazing: Karim Adiprasito proved the g-conjecture for spheres!
- The Trifference Problem
- Aubrey de Grey: The chromatic number of the plane is at least 5
- Sarkaria's Proof of Tverberg's Theorem 1
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Category Archives: Convex polytopes
Chaim Even-Zohar, Tsviqa Lakrec, and Ran Tessler present: The Amplituhedron BCFW Triangulation
There is a recent breakthrough paper The Amplituhedron BCFW Triangulation by Chaim Even-Zohar, Tsviqa Lakrec, and Ran Tessler Abstract: The amplituhedron is a geometric object, introduced by Arkani-Hamed and Trnka (2013) in the study of scattering amplitudes in quantum … Continue reading
Posted in Combinatorics, Convex polytopes, Convexity, Physics
Tagged Amplituhedron, Chaim Even-Zohar, Ran Tessler, Tsviqa Lakrec
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The Logarithmic Minkowski Problem
The logarithmic origin of Manhattan We are spending the fall semester in NYC at NYU and yesterday* I went to lunch with two old friends Deane Yang and Gaoyong Zhang. They told me about the logarithmic Minkowski problem, presented in the … Continue reading
Posted in Convex polytopes, Convexity, Updates
Tagged Deane Yang, Erwin Lutwak, Gaoyong Zhang, Károly Böröczky
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Giving a talk at Eli and Ricky’s geometry seminar. (October 19, 2021)
One of my favorite seminars in the world is the Courant Institute (NYU) Geometry seminar that Eli Goodman and Ricky Pollack started in the 1980s (I think). On Tuesday October 19, I will give a seminar, details follow. Jacob Eli … Continue reading
To cheer you up in difficult times 26: Two real-life lectures yesterday at the Technion
After 16 months without lecturing to an audience in my same location, I gave yesterday two lectures at the Technion in front of a live audience (and some additional audience in remote locations). The main lecture was in COMSOC 2021, … Continue reading
Posted in Combinatorics, Convex polytopes, Economics, Games, Rationality
Tagged COMSOC 2021
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To cheer you up in difficult times 22: some mathematical news! (Part 1)
To cheer you up, in these difficult times, here are (in two parts) some mathematical news that I heard in personal communications or on social media. (Maybe I will write later, in more details, about few of them that are … Continue reading
Posted in Combinatorics, Convex polytopes, Convexity, Geometry
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Tomorrow: Boolean functions day at the TAU theory fest
As part of the 2019/2020 TAU theory fest, tomorrow, Friday, January 3, 2020, is a Boolean function day at Tel Aviv University. The five speakers are Esty Kelman, Noam Lifschitz, Renan Gross, Ohad Klein, and Naomi Kirshner. For more (and … Continue reading
Karim Adiprasito: The g-Conjecture 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 g-conjecture, J Scott Provan, Karim Adiprasito, Leonid Gurvits, Lou Billera
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Beyond the g-conjecture – algebraic combinatorics of cellular spaces I
The g-conjecture for spheres is surely the one single conjecture I worked on more than on any other, and also here on the blog we had a sequence of posts about it by Eran Nevo (I,II,III,IV). Here is a great … Continue reading
Posted in Combinatorics, Convex polytopes, Geometry
Tagged Anders Bjorner, Bob MacPherson, Carl Lee, Ed Swartz, Eran Nevo, g-conjecture, Günter Ziegler, Isabella Novik, June Huh, Kalle Karu, Karim Adiprasito, Kazhdan-Lustig polynomials, Lou Billera, Marge Bayer, Peter McMullen, Richard Stanley, Ron Adin, Satoshi Murai, Tom Braden
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