Category Archives: People

An interview with Noga Alon

Update: and here is a great interview of Noga in English and the interviewer is Narkis Alon, Noga’s youngest daughter and Amalya Duek. I was very happy to interview my academic doctoral  twin and long-time friend Noga Alon.  The interview … Continue reading

Posted in Combinatorics, Computer Science and Optimization, People | Tagged | 6 Comments

The last paper of Catherine Rényi and Alfréd Rényi: Counting k-Trees

A k-tree is a graph obtained as follows: A clique with k vertices is a k-tree. A k-tree with n+1 vertices is obtained from a k-tree with n-vertices by adding a new vertex and connecting it to all vertices of a … Continue reading

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The (Random) Matrix and more

Three pictures, and a few related links. Van Vu Spoiler: In one of the most intense scenes, the protagonist, with his bare hands and against all odds, took care of the mighty Wigner semi-circle law in two different ways. (From … Continue reading

Posted in Combinatorics, People, What is Mathematics | Tagged , , , , , , | 1 Comment

My Copy of Branko Grünbaum’s Convex Polytopes

Branko Grünbaum is my academic grandfather (see this highly entertaining post for a picture representing five academic generations). Gunter Ziegler just wrote a beautiful article in the Notices of the AMS on Branko Grunbaum’s  classic book “Convex Polytopes”, so this … Continue reading

Posted in Combinatorics, Convex polytopes, People | Tagged , , | 4 Comments

After-Dinner Speech for Alex Lubotzky

An after-dinner speech given on November  9, 2016*, on Alex Lubotzky’s 60th birthday conference: 60 faces to Groups.   As we all realized waking up this morning, today is a historic day*. It is the dinner day for Alex 60th‘s … Continue reading

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