bio | website | math.tsukuba.ac.jp/~carnahan |
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location | 筑波市, Japan | |
age | ||
visits | member for | 5 years, 5 months |
seen | Mar 22 at 4:58 | |
stats | profile views | 17,313 |
I think this is a neat project.
Mar 26 |
awarded | Good Answer |
Mar 21 |
comment |
$\mathcal{M}_{g,n}$ a scheme for $n \gg 0$?
Bjorn's comment under JSE's answer addresses the representability question. The absence of automorphisms automatically yields an algebraic space, but the coarse moduli space is known to be a quasi-projective variety, so you get a scheme. |
Mar 21 |
comment |
$\mathcal{M}_{g,n}$ a scheme for $n \gg 0$?
This is covered in mathoverflow.net/questions/11253/… . See in particular JSE's answer. |
Mar 18 |
awarded | Nice Answer |
Mar 6 |
comment |
Maryam Mirzakhani's works
In general, if you want to know about a Fields Medalist's (pre-medal) work, the Laudationes is a good place to start, and is available at the IMU website. |
Mar 6 |
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When an elliptic curve is a quotient of $\mathbb{G}_a$?
The exponential function doesn't converge on the whole Lie algebra. Even after restriction, I think surjectivity would require base change to some period ring. |
Mar 5 |
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When an elliptic curve is a quotient of $\mathbb{G}_a$?
There is a $\mathbb{G}_m$-uniformization of $p$-adic analytic elliptic curves with bad reduction. However, the exponential function isn't $p$-adically entire, so lifting to an additive uniformization seems difficult. |
Mar 3 |
comment |
Definition of internal field objects
This might be the discussion you remember: mathoverflow.net/questions/3003/… |
Mar 2 |
reviewed | Close Embedding rational simple algebras in the real quaternions |
Feb 27 |
reviewed | Close Practical Way to Detect a Markov Chain is Regular Given the Transition Matrix |
Feb 25 |
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Automorphisms of a quotient variety
For your example, don't you need your automorphism of $\mathbb{A}^n$ to commute with the action of $k^\ast$? |
Feb 20 |
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Artin approximation of a diagram
Could you make the statement of your question more precise? |
Feb 20 |
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Axioms for sheaf cohomology
You should ask Tyler. It would be unfair for me to delete his contribution without his consent. |
Feb 19 |
awarded | Nice Answer |
Feb 19 |
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Concise mathematical definition of the fusion product on the Verlinde ring?
@DavidRoberts Fusion rules are defined as dimensions of certain vector spaces, so any procedure that produces that number gives you a definition of fusion rule. Could you say a bit more about what sort of answer you are seeking? |
Feb 19 |
answered | Concise mathematical definition of the fusion product on the Verlinde ring? |
Feb 16 |
reviewed | Close Is there a nontrivial maximally recursive function? |
Feb 15 |
reviewed | Close “Parallel translate” of a geodesic in the following sense |
Feb 15 |
comment |
Optimal shape for stabbing balls in $\mathbb{R}^3$
As Douglas Zare suggests, a tangent line has infinite expected hit/length ratio. |
Feb 12 |
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Constant group scheme and torsors
You should make $X$ into a pointed connected scheme to define $\pi_1(X)$, and your definition of torsor is missing the condition that $Y$ admits a local section. You have defined the notion of pseudo-torsor, and the empty scheme is a standard example of a pseudo-torsor. |