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Recent Posts
 Mathematical Gymnastics
 Media Item from “Haaretz” Today: “For the first time ever…”
 Jim Geelen, Bert Gerards, and Geoﬀ Whittle Solved Rota’s Conjecture on Matroids
 Media items on David, Amnon, and Nathan
 Next Week in Jerusalem: Special Day on Quantum PCP, Quantum Codes, Simplicial Complexes and Locally Testable Codes
 Happy Birthday Ervin, János, Péter, and Zoli!
 My Mathematical Dialogue with Jürgen Eckhoff
 Test Your Intuition (23): How Many Women?
 Happy Birthday Richard Stanley!
Top Posts & Pages
 Two Math Riddles
 The Ultimate Riddle
 The KadisonSinger Conjecture has beed Proved by Adam Marcus, Dan Spielman, and Nikhil Srivastava
 Why is mathematics possible?
 Answer: Lord Kelvin, The Age of the Earth, and the Age of the Sun
 When It Rains It Pours
 Mathematical Gymnastics
 Why Quantum Computers Cannot Work: The Movie!
 Polymath 8  a Success!
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Author Archives: Gil Kalai
Answer to Test Your Intuition (22)
Indeed, most people got it right! Bundling sometimes increases revenues, sometimes keeps revenues the same, and sometimes decreases revenues. In fact, this is an interesting issue which was the subject of recent research effort. So here are a few … Continue reading
Posted in Economics, Test your intuition
Tagged Auctions, Noam Nisan, Sergiu Hart, Test your intuition
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Test your intuition (22): Selling Two Items in a Bundle.
One item You have one item to sell and you need to post a price for it. There is a single potential buyer and the value of the item for the buyer is distributed according to a known probability distribution. It … Continue reading
Why Quantum Computers Cannot Work: The Movie!
Here are links to a videotaped lecture in two parts entitled “why quantum computers cannot work” recorded at the Simons Institute for the Theory of Computing on December 2013 and two additional videos: a short talk on topological quantum computers … Continue reading
Posted in Movies, Quantum
Tagged Quantum computation, Quantum computers, Quantum faulttolerance, Videotaped lectures
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Levon Khachatrian’s Memorial Conference in Yerevan
Workshop announcement The National Academy of Sciences of Armenia together American University of Armenia are organizing a memorial workshop on extremal combinatorics, cryptography and coding theory dedicated to the 60th anniversary of the mathematician Levon Khachatrian. Professor Khachatrian started his … Continue reading
NavierStokes Fluid Computers
Smart fluid Terry Tao posted a very intriguing post on the NavierStokes equation, based on a recently uploaded paper Finite time blowup for an averaged threedimensional NavierStokes equation. The paper proved a remarkable negative answer for the regularity conjecture for a certain … Continue reading
Pictures from Recent Quantum Months
A special slide I prepared for my lecture at Gdansk featuring Robert Alicki and I as climber on the mountain of quantum computers “because it is not there.” It has been quite a while since I posted here about quantum … Continue reading
Posted in Conferences, Quantum, Updates
Tagged Aram Harrow, Connie Sidles, John Sidles, Michal Horodecki, Michel Dyakonov, Quantum computers, Rico Picone, Robert Alicki, Updates, Yuri Gurevich
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Joel David Hamkins’ 1000th MO Answer is Coming
Update (May 2014): The second MO contributor to answer 1000 questions is another distinguished mathematician (and a firend) Igor Rivin. Joel David Hamkins’ profile over MathOverflow reads: “My main research interest lies in mathematical logic, particularly set theory, focusing on the … Continue reading
Amazing: Peter Keevash Constructed General Steiner Systems and Designs
Here is one of the central and oldest problems in combinatorics: Problem: Can you find a collection S of qsubsets from an nelement set X set so that every rsubset of X is included in precisely λ sets in the collection? … Continue reading
Many Short Updates
Things in Berkeley and later here in Jerusalem were very hectic so I did not blog much since mid October. Much have happened so let me give brief and scattered highlights review. Two “real analysis” workshops at the Simons Institute … Continue reading
Posted in Conferences, Updates
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