9,399 reputation
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bio website gilkalai.wordpress.com
location Jerusalem
age 59
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Professor of Mathematics at the Hebrew University of Jerusalem and at Yale University

Dec
11
revised Fundamental Examples
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Dec
11
revised Fundamental Examples
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Dec
10
accepted Generalizations of the Birkhoff-von Neumann Theorem
Dec
10
accepted What is an integrable system
Dec
9
answered Fundamental Examples
Dec
9
comment Badiou and Mathematics
I see no reason to close. Mathematics is used (and abused) in many ways/areas outside mathematics. It is certainly of interest to mathematicians. About blog discussions: it is true that mathoverflow far from ideal for discussion but it does provide many opportunities for discussions and blogs often cannot compete. I tried to transport a discussion about planar graphs from MO to my blog with little success. There are only few blogs with genuine mathematical discussions. Discussions in MO is like sex in cars; it is a terrible platform, but often it provides the only available opportunity.
Dec
8
answered What's a nice argument that shows the volume of the unit ball in $\mathbb R^n$ approaches 0?
Dec
8
revised Fundamental Examples
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Dec
8
answered Generalizations of Planar Graphs
Dec
7
revised Generalizations of Planar Graphs
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Dec
7
comment Generalizations of Planar Graphs
I meant algebraiv variety of reak dimension 2k, we can even insist it is a smooth variety.
Dec
7
comment Generalizations of Planar Graphs
Dear Konrad, this is indeed an important generalization of planar graphs. (I am not so sure lambda<=3 gives planarity rather than the very related "not having a K_5-minor".)
Dec
7
comment What are good non-English languages for mathematicians to know?
Hungarian, of course
Dec
7
answered Generalizations of Planar Graphs
Dec
7
awarded  Nice Question
Dec
6
comment Generalizations of Planar Graphs
Actually, It can be conjectured that k-dimensional startified spaces that can be embedded into Witt 2k-dimensional spaces with vanishing middle homology are already appropriate analogs for planarity. On the other hand in analogy with the fact that every graph can be embedded into some surface I wonder if every k-dimensional stratified space (or simplicial complex) can be embedded into some 2k-dimensional algebraic variety.
Dec
6
answered Generalizations of Planar Graphs
Dec
6
comment most general way to generate pairwise independent random variables?
There is a large body of literature on constructions of k-wise independent random variables. I suggest to look at Alon and Spencer's book on the probabilistic method.
Dec
6
revised books well-motivated with explicit examples
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Dec
6
revised Fundamental Examples
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