4,609 reputation
21636
bio website ryancreich.info
location Los Angeles, CA
age 32
visits member for 4 years, 7 months
seen 2 days ago
I am a postdoc at U Michigan (Ann Arbor). I was a graduate student at Harvard, where my advisor was Dennis Gaitsgory, and I graduated in the spring of 2011. In short, I do geometric representation theory, which in the case of my thesis means perverse sheaves on the affine grassmannian with some gerbes thrown in, but could also mean something much more elementary. I'm also active on tex.stackexchange.com.

Nov
24
awarded  Necromancer
Nov
16
comment Are there any books that take a 'theorems as problems' approach?
@paulgarrett If I understand you correctly: I've never understood why people like this book so much either.
Oct
6
comment Why do roots of polynomials tend to have absolute value close to 1?
@Andrej I noticed the slight tendency of the roots to cluster near 1 and to disperse more near -1, and I'm curious if anyone can provide a statistical explanation to explain this effect. It does seem that there is a strong tendency to be nearly uniform, and this is sort of a second-order thing.
Oct
6
revised Why do roots of polynomials tend to have absolute value close to 1?
update distinct roots stuff
Oct
6
revised Why do roots of polynomials tend to have absolute value close to 1?
improve proof of small ball
Oct
6
answered Why do roots of polynomials tend to have absolute value close to 1?
Oct
1
comment Why $( \infty , n)$-categories are useful for?
Seems to me that $(\infty, 1)$-categories are supposed to be considered as an enrichment of the concept of just "category"; i.e. they are not higher categories so much as they are deeper categories. Then $(\infty, n)$-categories are deeper, higher categories. Do you think that ordinary higher categories (i.e. 2-categories, 3-categories, etc.) are useful? If so, then their infinity version must be even more useful.
Sep
30
awarded  Explainer
Sep
30
revised What is the most useful non-existing object of your field?
added 24 characters in body
Sep
30
comment What is the most useful non-existing object of your field?
Neither $-1$ nor 0 works, as they are contained in every field.
Sep
29
comment What is the most useful non-existing object of your field?
@downvoter if you don't like the joke, it's enough just not to laugh.
Sep
29
comment What is the most useful non-existing object of your field?
@Toby Yes, that's right.
Sep
29
answered What is the most useful non-existing object of your field?
Sep
23
awarded  Good Answer
Sep
23
awarded  Nice Answer
Aug
23
awarded  Nice Answer
Aug
23
answered A question about “Zariski dense” arguments
Jul
25
comment Cohomology group vs sheaf of cohomology group
This is probably the fanciest version of the "Law of universal linearity" that I've seen yet.
Jul
19
comment Should all equations which appear in a thesis be numbered?
Doesn't this mean that the hidden numbers will cause gaps in the sequence of explicit numbers?
Jul
2
awarded  Curious