9,066 reputation
11111196
bio website gilkalai.wordpress.com
location Jerusalem
age 59
visits member for 5 years, 1 month
seen 4 mins ago
Professor of Mathematics at the Hebrew University of Jerusalem and at Yale University

9h
revised Solutions to the Continuum Hypothesis
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10h
reviewed Approve Prehomogeneous vector spaces
10h
reviewed Approve Did Grothendieck write about modular forms?
Dec
9
awarded  Good Question
Dec
9
answered Generalizations of the Four-Color theorem
Dec
8
awarded  Popular Question
Dec
7
awarded  Nice Question
Dec
7
revised Generalizations of the Four-Color theorem
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Dec
7
asked Generalizations of the Four-Color theorem
Dec
2
comment Bounding the absolute sum of entries of the inverse of a 0-1 matrix
(belated) Welcome to MO, Noga!
Dec
2
comment lower-bound for $Pr[X\geq EX]$
Dear Fedja, This is a very nice proof, and especially the new nice trick to pass to exp (2Y) and what follows. As Ryan mentioned there is a nice conjecture by Uri Feige (in the paper) that the best bound is obtained when each of the n variables is n+1 with probability 1/(n+1).
Nov
5
awarded  Yearling
Sep
30
awarded  Explainer
Sep
27
comment Characterizing faces of 3-dimensional polyhedra. (Related to Victor Eberhard's Theorem [1890]:)
Dear Kundor, as it turned out the question remains open. (I forgot to update.)
Sep
27
revised Characterizing faces of 3-dimensional polyhedra. (Related to Victor Eberhard's Theorem [1890]:)
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Aug
22
awarded  Good Answer
Aug
13
revised How to find ICM talks?
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Aug
13
awarded  Favorite Question
Aug
11
revised A Conjecture About Directed Graphs that are the Union of Two Trees
added 410 characters in body
Aug
9
awarded  Nice Answer