bio | website | gilkalai.wordpress.com |
---|---|---|
location | Jerusalem | |
age | 59 | |
visits | member for | 5 years, 4 months |
seen | 15 hours ago | |
stats | profile views | 17,659 |
Professor of Mathematics at the Hebrew University of Jerusalem and at Yale University
Nov 12 |
answered | Fundamental Examples |
Nov 12 |
awarded | Self-Learner |
Nov 12 |
comment |
Groupoid of moves on trivalent fatgraph
i did not understand the second move. But first what is a fatgraph? |
Nov 12 |
revised |
Fundamental Examples
edited tags |
Nov 12 |
answered | Fundamental Examples |
Nov 12 |
answered | Fundamental Examples |
Nov 12 |
answered | Fundamental Examples |
Nov 11 |
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Fundamental Examples
I agree, complex projective planes (and spaces), real projective planes and spaces, and those over finite field are very important examples. |
Nov 11 |
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What precisely Is “Categorification”?
I came across this description, but I cannot imagine how Betti numbers were defined to start with. |
Nov 11 |
comment |
What precisely Is “Categorification”?
what do you mean by moving from Betti numbers to homology; arnt the Betti number defined as the dimensions of homology to start with? |
Nov 11 |
revised |
Fundamental Examples
added 80 characters in body |
Nov 11 |
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Fundamental Examples
I see, I guess it is a concrete example! (and even a popular one.) |
Nov 11 |
answered | Fundamental Examples |
Nov 11 |
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Fundamental Examples
Also if the example has a central importance but it is hard to say that it shaped the field, this is also OK! |
Nov 11 |
comment |
Fundamental Examples
I prefer really a "real example" (rather than a theorem or a concept) and really a single example (rather than a link to many examples). I see no problem that the answeres's reputation will depend on the quality/popularity of the example. In many cases of basic examples a thorough explenation of how the example shaped the field is not needed. |
Nov 11 |
comment |
What precisely Is “Categorification”?
Is moving from the notion of "Euler characteristic" to the notion of "homology" a sort of prototype to categorification? |
Nov 11 |
answered | Fundamental Examples |
Nov 11 |
answered | Fundamental Examples |
Nov 11 |
answered | What is the first interesting theorem in (insert subject here)? |
Nov 11 |
comment |
Fundamental Examples
It is interesting, but this is a theorem, not an example right? |