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bio website gilkalai.wordpress.com
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Professor of Mathematics at the Hebrew University of Jerusalem and at Yale University

Nov
24
revised How Does Random Noise Typically Look?
added 863 characters in body
Nov
24
answered What is the Cayley projective plane?
Nov
24
comment Fundamental Examples
Dear Qiaochu, There are various interpretations of the meaning of "examples" for this question and it is nice to see them all.
Nov
24
revised What precisely Is “Categorification”?
edited tags; edited tags
Nov
24
answered Fundamental Examples
Nov
24
comment Fundamental Examples
This reminds me that we did not include any number in our list. Probably pi and e are too fundamental, but the Euler constant could be a candidate.
Nov
24
revised The Sylvester Gallai Theorem and Sections of Varieties with “Simple Topology”.
added 187 characters in body
Nov
23
comment Fundamental Examples
I agree that basic mathematical examples which are fundamental in physics or other sciences should be counted. (And often they become fundamental in mathematics as well.) We can add the Poincare group en.wikipedia.org/wiki/Poincar%C3%A9_group along with the group SU(3) x SU(2) x U(1) (en.wikipedia.org/wiki/Standard_Model)
Nov
23
comment Examples for Decomposition Theorem
To what extent does Lusztig's work rely on the decomposition theorem?
Nov
23
comment Fundamental Examples
Here is a link for ADE classification: en.wikipedia.org/wiki/ADE_classification and here are links for the A-B-C-D-E-F-G root systems and finite Coxeter groups via Dynkin diagrams en.wikipedia.org/wiki/Root_system en.wikipedia.org/wiki/Coxeter%E2%80%93Dynkin_diagram
Nov
23
comment Fundamental Examples
here is a link: en.wikipedia.org/wiki/Penrose_tiling
Nov
23
comment Fundamental Examples
This answer is by Euclid mathoverflow.net/users/2033/euclid I just added the link and picture.
Nov
23
revised Fundamental Examples
added 165 characters in body
Nov
23
revised The Sylvester Gallai Theorem and Sections of Varieties with “Simple Topology”.
added 1 characters in body
Nov
23
answered Generalizations of Boolean posets/lattices
Nov
22
awarded  Nice Answer
Nov
22
revised Fundamental Examples
added the words - or few
Nov
22
comment Fundamental Examples
How does it touches the Quaternions?
Nov
22
answered Fundamental Examples
Nov
22
awarded  Nice Question