Category Archives: Geometry

Alef’s Corner: Math Collaboration 2

Posted on September 2, 2020 by

Other Alef’s corner posts

Posted in Art, Combinatorics, Geometry, What is Mathematics | Tagged | Leave a comment

Or Ordentlich, Oded Regev and Barak Weiss: New bounds for Covering Density!

Posted on March 18, 2020 by

Update (June 3, 2020): The paper New bounds on the density of lattice coverings is now on the arXiv. Barak Weiss lectured about his breakthrough results with Or Ordentlich, and Oded Regev, at a Simons Institute workshop: Lattices: Geometry, Algorithms and … Continue reading →

Posted in Combinatorics, Computer Science and Optimization, Geometry | Tagged , , | 3 Comments

To cheer you up in complicated times – A book proof by Rom Pinchasi and Alexandr Polyanskii for a 1978 Conjecture by Erdős and Purdy!

Posted on March 14, 2020 by

Things do not look that good, and these are difficult times. But here on the blog we have plenty of things to cheer you up and assure you. And today we point to two book proofs — two book proofs … Continue reading →

Posted in Combinatorics, Geometry, What is Mathematics | Tagged , | 8 Comments

Do Not Miss: Abel in Jerusalem, Sunday, January 12, 2020

Posted on January 11, 2020 by

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 , , , | 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

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 →

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

Posted on December 18, 2019 by

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

Old lecture notes by Alex Zabrodsky

Posted on December 14, 2019 by

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 | 1 Comment

Starting today: Kazhdan Sunday seminar: “Computation, quantumness, symplectic geometry, and information”

Posted on October 27, 2019 by

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 →

Posted in Combinatorics, Computer Science and Optimization, Geometry, Physics, Teaching | Tagged , , , | Leave a comment

Alef’s corner: Bicycles and the Art of Planar Random Maps

Posted on September 17, 2019 by

The artist behind Alef’s corner has a few mathematical designs and here are two new ones. (See Alef’s  website offering over 100 T-shirt designs.)   which was used for the official T-shirt for Jean-François Le Gall’s birthday conference. See also … Continue reading →

Posted in Art, Combinatorics, Geometry, Probability | Tagged | Leave a comment

Mohammad Ghomi and Joel Spruck settled the Cartan-Hadamard conjecture!

Posted on August 28, 2019 by

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 | Tagged , , , | 5 Comments