Monthly Archives: September 2024

Viterbo’s conjecture was refuted by Pazit Haim-Kislev and Yaron Ostrover

Posted on September 23, 2024 by Gil Kalai

Viterbo conjecture – refuted Claude Viterbo’s 2000 volume-capacity conjecture asserts that the Euclidean (even dimensional) ball maximizes  (every) symplectic capacity  among convex bodies of the same volume. In the recent paper A Counterexample to Viterbo’s Conjecture, Pazit Haim-Kislev and Yaron … Continue reading →

Posted in Convex polytopes, Convexity, Geometry, Open problems | Tagged , , , , | 3 Comments

Timothy Chow’s Amazing Fifteen Boxes Puzzle (TYI 56)

Posted on September 20, 2024 by Gil Kalai

TYI56 asked the following question of Timothy Chow: You have fifteen boxes labelled with the English letters from A to O. Two identical prizes are placed in two (distinct) boxes chosen at random. Andrew’s  search order is  ABCDEFGHIJKLMNO. Barbara’s search … Continue reading →

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

Pictures from Our 2024 Annual Meeting of the Israel Mathematical Union and Student Day

Posted on September 15, 2024 by Gil Kalai

To me and to many mathematicians in Israel, the Annual meeting of the Israeli Mathematical Union is a dear event and we try to take part. (Here we briefly described the 2017 meeting in Acre, and here the 2014 meeting … Continue reading →

Posted in Algebra, Analysis, Computer Science and Optimization | Tagged , , | Leave a comment

Two Events

Posted on September 6, 2024 by Gil Kalai

Israeli Mathematical Union annual meeting and student talks day, Sunday and Monday, September 8 – 9, 2024. The Annual meeting of the Israeli Mathematical Union will be held on Sunday, September 8th 2024 at the Weizmann Institute. The main speakers … Continue reading →

Posted in Combinatorics, Computer Science and Optimization, Conferences, Number theory | Leave a comment

Test Your Intuition 56: Fifteen Boxes Puzzle

Posted on September 3, 2024 by Gil Kalai

Andrew and Barbara are playing a game. Fifteen boxes are arranged in a 3-by-5 grid, labeled with the letters A through O, as shown below. A B C D E F G H I J K L M N O … Continue reading →

Posted in Probability, Riddles, Test your intuition | Tagged , | 42 Comments