9,409 reputation
11119199
bio website gilkalai.wordpress.com
location Jerusalem
age 59
visits member for 5 years, 5 months
seen 3 hours ago
Professor of Mathematics at the Hebrew University of Jerusalem and at Yale University

Nov
26
asked Generalizations of the Birkhoff-von Neumann Theorem
Nov
26
answered Do good math jokes exist?
Nov
26
answered Fundamental Examples
Nov
26
comment Fundamental Examples
Of course, for this question and many others there is no meaning to "correct answer". In fact I liked all the answers to the question and I hope more answers will come along. Jose was the most valuable partner to this endeavor and he contributed several great answers both before and after the boundy was announced.
Nov
26
accepted Fundamental Examples
Nov
26
awarded  Nice Answer
Nov
25
answered How to think about CM rings?
Nov
25
comment How Does Random Noise Typically Look?
Let me point out that the question is a fairly technical and "dry" question. In the formulation proposed by Greg is it is entirely concrete. (I am simply curious about the answer. And, yes, maybe I miss something obious.)
Nov
24
awarded  Notable Question
Nov
24
revised Fundamental Examples
added 58 characters in body
Nov
24
answered Fundamental Examples
Nov
24
answered Fundamental Examples
Nov
24
comment What is known about polyhedra nets that allow overlapping?
Interesting question. I dont see much hope for a positive result for non convex polyhedra (even spherical).
Nov
24
comment Generalizations of Boolean posets/lattices
Here is a link to a paper springerlink.com/content/v141451p51820482 which studies simultaneuosly a basic questions regarding ranks of incidence matrices for the Boolean lattice and for the lattice of subspaces over a field with q elements.
Nov
24
comment How Does Random Noise Typically Look?
Dear Ben, Thanks! The crux of the question is if when we properly define a notion of "random noise" does it behave (when we restrict the number of garbled bits) like the noise you described, namely like a situation where the bits are garbled independently. Greg Kuperberg proposed to define random noise via random stochastic maps, see his answer.
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