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(formerly user "unknowngoogle", and for a very short time "red herring" but that was a red herring)
May 1 |
comment |
Finite-space 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 Giorgi-Nash-Moser 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 Grothendieck-Teichmuller 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) |
Mar 13 |
comment |
Reference Request: Fundamental Group Scheme
@Stefan Kohl: why? It seems to me the OP is asking a legitimate reference request (I added the appropriate tag), also specifying his background. He is not asking people to write an expository article for him, or similar stuff... |
Mar 6 |
reviewed | Reject latex tag wiki excerpt |
Mar 3 |
comment |
Classification of PDE
Re "Nowadays, the interesting PDEs are non-linear": what about Schroedinger's equation? If I'm not mistaken it's linear, isn't it? |