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seen Dec 27 '13 at 2:36

Oct
29
accepted How could $Y(1)$ be the quotient of the upper half plane?
Oct
29
comment How could $Y(1)$ be the quotient of the upper half plane?
I can't think of points where it is branched, which would make it a covering map...
Oct
29
asked How could $Y(1)$ be the quotient of the upper half plane?
Sep
13
comment A few questions about $\mathbb{Q}$-models of modular curves (curves given by congruence groups)
The cover is defined, but it is not nec. Galois.
Sep
5
comment In what sense is Taniyama-Shimura the $n=2$ case of Langlands?
Every time I reread it I retain more. Thanks again for the answer!
Sep
5
revised A few questions about $\mathbb{Q}$-models of modular curves (curves given by congruence groups)
expanded question
Sep
4
comment A few questions about $\mathbb{Q}$-models of modular curves (curves given by congruence groups)
Are you saying $X(N)\rightarrow \mathbb{P}^1$ is always defined together with the group action over $\mathbb{Q}$? This surprises me. I thought $PSL_2(\mathbb{F}_p)$ is not known (for a general prime $p$) to be realized as a Galois group over $\mathbb{Q}$. I think Shih proved it was just for some of the primes.... Are you sure you didn't mean defined without the group action over $\mathbb{Q}$? That would make more sense. (P.S. Thanks a lot for the answer)
Sep
4
asked A few questions about $\mathbb{Q}$-models of modular curves (curves given by congruence groups)
Sep
3
comment Can one write a PhD thesis before going into a PhD progam?
You can peruse my questions and see that I, too, am advanced for my age. But just read some theses. Much of the point of theses is that they are in depth. You need to be familiar with most of the literature on the topic (most of which you will probably not be able to read until years from now) and you have to make sure that you thought about all the ways to think about the phenomena discussed in the thesis. A thesis is meant to be work that takes years to do, and prepares you for independent research.
Sep
3
comment Can one write a PhD thesis before going into a PhD progam?
Unless you are one of the 10 most mathematically talented people in the world AND started doing professional math in your early teens, it is completely unrealistic.
Sep
3
revised Is it true that $\forall G\leq Aut(\mathbb{P}^1)=PGL_2(\mathbb{C})$ the map $\mathbb{P}^1\rightarrow \mathbb{P}^1/G$ is defined over $\mathbb{Q}$?
edited title
Sep
3
comment Is it true that $\forall G\leq Aut(\mathbb{P}^1)=PGL_2(\mathbb{C})$ the map $\mathbb{P}^1\rightarrow \mathbb{P}^1/G$ is defined over $\mathbb{Q}$?
I'm not aware of this literature, and I only vaguely remember hearing about the McKay correspondence. Are you saying it is true?
Sep
3
asked Is it true that $\forall G\leq Aut(\mathbb{P}^1)=PGL_2(\mathbb{C})$ the map $\mathbb{P}^1\rightarrow \mathbb{P}^1/G$ is defined over $\mathbb{Q}$?
Sep
1
comment What is $\operatorname{Aut}(\operatorname{PSL}_2(\mathbb{F}_q))$?
Cool! Thanks...
Sep
1
asked What is $\operatorname{Aut}(\operatorname{PSL}_2(\mathbb{F}_q))$?
Aug
31
asked What is the definition of the Euler characteristic of a stack?
Aug
17
comment Question about non-positive Stochastic processes
What would you consider a good reference for this, so I can learn more? (for example, why the columns span the eigenspace of 1)
Aug
17
comment Question about non-positive Stochastic processes
This was excellent! Thank you very much.
Aug
17
accepted Question about non-positive Stochastic processes
Aug
17
revised Question about non-positive Stochastic processes
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