bio  website  

location  
age  
visits  member for  5 years, 2 months 
seen  11 hours ago  
stats  profile views  4,752 
(formerly user "unknowngoogle", and for a very short time "red herring" but that was a red herring)
1d

revised 
interpolation between Bochner spaces
edited title 
May 14 
revised 
Using mirrors to make a nonconvex polygon visible from a fixed interior point
(little typo in title) 
May 7 
comment 
Action of $\mathbb{CP}^\infty$ on $U(\infty)$
I would (very naively!) have expected an action of $U(\infty)$ on $\mathbb{CP}^{\infty}$ (coming from the action of $U(n+1)$ on $\mathbb{C}^{n+1}$) rather than the other way around. Now I'm curious :) 
May 1 
comment 
Finitespace dynamical systems
But.. isn't the Frobenius the identity on points? Despite the nontriviality of the action on regular functions and on cohomology, I'm not sure this qualifies as a "finite dynamical system" for the OP.. 
May 1 
revised 
Why is there a connection between enumerative geometry and nonlinear waves?
deleted 119 characters in body 
Apr 19 
revised 
Nash's proof of De GiorgiNashMoser theorem
(spelling) 
Apr 18 
revised 
Making the identification $\tau M\approx TM\oplus (TM\odot TM)$
edited body 
Apr 14 
awarded  Good Question 
Mar 29 
asked  When does an algebraic space that is a torsor over a scheme have to be a scheme? 
Mar 24 
comment 
Which way for reading the proofs?
The OP is a master student in math, but I think the question (and the answer it gets) could be equally interesting for any mathematician 
Mar 22 
revised 
Did Grothendieck write about modular forms?
added 13 characters in body 
Mar 22 
comment 
Where is a good place to start learning about the GrothendieckTeichmuller group?
Is the word "algebroic" (perhaps related to... groupoids?) intentional or just a typo? :) 
Mar 22 
comment 
When does the sequence of iterates of a rational function converge?
By "rotation", do you mean something conjugate to $z \mapsto e^{i \theta}$ ($\theta$ irrational with $\pi$)? 
Mar 22 
comment 
When does the sequence of iterates of a rational function converge?
@G.E.: most probably given the tags, the Riemann sphere $\mathbb{CP}^1$. 
Mar 22 
revised 
why is it so cool to square numbers? (in terms of finding the standard deviation)
edited body 
Mar 19 
comment 
What is the stalk of a stack?
Oh I see what you mean. (On the other hand, if $F$ is a sheaf of modules on a $k$scheme $X$ and $x:\mathrm{Spec}(k)\to X$ is a (closed) point, the $k$ vector space $x^{*} F$ is the fiber at $x$, not the stalk). 
Mar 18 
awarded  Yearling 
Mar 18 
comment 
What is the stalk of a stack?
My comment comes too late, but I have the impression that your construction actually gives the fiber, not the stalk, of whatever thing you are considering (sheaf, space, stack,...). 
Mar 17 
comment 
When does $\overline{U(0,1)}=B(0,1)$ hold?
It would be useful if you add the definiton of $U(0,1)$ and $B(0,1)$. Are they the "$< 1$" and "$\leq 1$" discs centered at the origin, respectively, I guess? 
Mar 13 
revised 
Reference Request: Fundamental Group Scheme
(added "reference request" tag) 