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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 $\rho_{\ell} : \pi_{1}(\mathrm{Spec}(K)) \to \mathrm{Aut}(T_{\ell}(E))$".