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visits | member for | 3 years, 10 months |
seen | Sep 23 at 7:56 | |
stats | profile views | 806 |
Jul 5 |
comment |
Topological fundamental group of a variety
you could have a look at arxiv.org/abs/1311.6086 On the fundamental group of a variety with quotient singularities Indranil Biswas, Amit Hogadi |
Jun 22 |
revised |
Injectivity of Section conjecture
added 104 characters in body |
Jun 22 |
revised |
Injectivity of Section conjecture
added 104 characters in body |
Jun 22 |
answered | Injectivity of Section conjecture |
Jan 31 |
comment |
Basics on anabelian geometry and Grothendieck's section conjecture
seems very redundant with mathoverflow.net/questions/108860/… to me. |
Jan 24 |
comment |
linearly reductive group acting on $X$
Then, this holds. You just derive the formula for $i=0$ using (for instance) Grothendieck's spectral sequence for the derived functors of a composite functor, and the fact that $(\cdot)^G$ is exact. There is an elementary direct proof of course. |
Jan 24 |
comment |
another question on the Manin-Drinfeld theorem
You could have a look at the book Modular Units Daniel S. Kubert, Serge Lang specifically the chapter The Cuspidal Divisor Class Group on X(N) Good luck ! |
Jan 24 |
comment |
linearly reductive group acting on $X$
What are $\mathcal{F}$,$\mathcal{G}$ ? |
Jan 10 |
answered | Spin group as an automorphism group |
Dec 21 |
comment |
What is your picture of the flat topology?
"don't forget to buy my products" means "vote for my answer" ? |
Dec 19 |
awarded | Yearling |
Dec 2 |
comment |
homotopy exact sequence for the étale fundamental group
In my opinion this part of SGA1 does need no translation, it is perfectly clear. |
Dec 1 |
comment |
homotopy exact sequence for the étale fundamental group
basically it is way too involved in my opinion. I would suggest to have a look at SGA1 which I find much more clear. |
Nov 25 |
comment |
homotopy exact sequence for the étale fundamental group
will all respect, this is very explicit, but this is not very understandable ... |
Nov 16 |
answered | Group action on a stack and fixed points |
Nov 11 |
comment |
Classifying spaces of algebraic groups
hint : this is the pull-back of the universal $BG_m$ torsor via $Bdet: BGL_r\to BG_m$. |
Oct 17 |
revised |
Explicit description of the stack associated to a groupoid
edited body |
Oct 16 |
answered | Explicit description of the stack associated to a groupoid |
Sep 2 |
comment |
alternate interpretations of Galois action on Tate module
the action you define is clearly independent of the section, so your question has little to do with sections. |
Sep 2 |
comment |
alternate interpretations of Galois action on Tate module
You probably mean "we get an action $\rho_{\ell} : \pi_{1}(\mathrm{Spec}(K)) \to \mathrm{Aut}(T_{\ell}(E))$". |