Monthly Archives: December 2019

The Google Quantum Supremacy Demo and the Jerusalem HQCA debate.

Posted on December 27, 2019 by Gil Kalai

Below are 10 annotated slides from a spontaneous informal talk that I gave at the school on mathematics of quantum computing a weak ago. (Power point presentation.) Later in the afternoon we had  a panel/debate on quantum supremacy (click for … Continue reading →

Posted in Controversies and debates, Quantum | Tagged , , , , , , , , , , | 5 Comments

Four Great Numberphile Graph Theory Videos

Posted on December 24, 2019 by Gil Kalai

A quick link to our previous post: Gil Bor, Luis Hernández-Lamoneda, Valentín Jiménez-Desantiago, and Luis Montejano-Peimbert: On the isometric conjecture of Banach.   We have mentioned the Numberphile video channel before (here, and here, and here). It has amazing videos for … Continue reading →

Posted in Combinatorics | Tagged , , , , , | Leave a comment

Gil Bor, Luis Hernández-Lamoneda, Valentín Jiménez-Desantiago, and Luis Montejano-Peimbert: On the isometric conjecture of Banach

Posted on December 23, 2019 by Gil Kalai

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 n-Category cafe. This post briefly describes a May 2019 paper On the isometric conjecture … Continue reading →

Posted in Geometry | Tagged , , , , | Leave a comment

Abel in Jerusalem – SUNDAY, January 12, 2020, and other events

Posted on December 18, 2019 by Gil Kalai

Update: Boris Solomyak’s birthday conference (January 13-14, Bar-Ilan 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 →

Posted in Algebra, Analysis, Combinatorics, Computer Science and Optimization, Conferences, Geometry, Updates | Tagged , , , | 1 Comment

Test Your Intuition 42: How Much do you Gain by Knowing The Game You Play?

Posted on December 16, 2019 by Gil Kalai

There are two players  – the row player and the column player and there are two possible zero-sum games described in the picture below. For each of these games the row players has two strategies T (top) and Bottom (B) … Continue reading →

Posted in Games, Test your intuition | Tagged , , , | 6 Comments

Old lecture notes by Alex Zabrodsky

Posted on December 14, 2019 by Gil Kalai

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 →

Posted in Geometry, People | Tagged | 2 Comments

TYI 41: How many steps does it take for a simple random walk on the discrete cube to reach the uniform distribution?

Posted on December 2, 2019 by Gil Kalai

Aeiel Yadin’s homepage contains great lecture notes on harmonic functions on groups and on various other topics. I have a lot of things to discuss and to report; exciting developments in the analysis of Boolean functions; much to report on … Continue reading →

Posted in Combinatorics, Probability, Test your intuition | Tagged , , | Leave a comment