bio  website  mathematik.unimainz.de/… 

location  Mainz  
age  27  
visits  member for  4 years, 9 months 
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Postdoc at JohannesGutenberg Universität Mainz. Interested in many things, but especially arithmetic geometry.
1d

comment 
An extension of group schemes admitting Neron models
On the other hand, the implications a implies b and a implies e of Thm 10.2.1 hold in general (as you probably already know). There might be a way to circumvent the compactification results and to prove that a group scheme not containing any copy of G_a or G_m is "bounded" directly (but I doubt it...). 
1d

comment 
An extension of group schemes admitting Neron models
If I'm not mistaken, the necessary "compactification" resuts used in Thm 10.2.1 are now known for not necessarily commutative group schemes by the work of Gabber. Try googling Gabber's compactification theorem to see if you get something useful. 
1d

reviewed  Reject Refereeing a Paper 
2d

answered  Is there a Riemann existence theorem for orbifolds? 
Dec 19 
revised 
Weil height of an Abelian Variety with everywhere (potentially) good reduction
deleted 1 character in body 
Dec 19 
reviewed  Approve transition matrix 
Dec 18 
revised 
Weil height of an Abelian Variety with everywhere (potentially) good reduction
added some tags 
Dec 18 
answered  Weil height of an Abelian Variety with everywhere (potentially) good reduction 
Dec 15 
comment 
The cohomology of an $S_{3}$ cover of an elliptic curve ramified in one point
@jmc You can only have two points. The partitions of six which are possible are given by 2+2+2 and 3+3 a priori. You can't have 2+2+2, because then deg R = 2 1 + 21 +21 = 3 is odd. 
Nov 30 
reviewed  Approve Functions in “gaps” in Hardy hierarchy 
Nov 25 
comment 
Fermat's last theorem over larger fields
@Pablo I added some more details to my comment above. 
Nov 25 
comment 
Fermat's last theorem over larger fields
@René Yes, I was worried about that. HIT just gives you points of degree five in this case, but probably no Galois points. If you pass to the Galois closure of $f$ you will generate many Galois points, but these might not be abelian... 
Nov 25 
revised 
Fermat's last theorem over larger fields
added 289 characters in body 
Nov 25 
comment 
Fermat's last theorem over larger fields
@Pablo I guess you are then already aware of what I wrote in my "answer", and that it doesn't work in fact (or does it?). 
Nov 25 
answered  Fermat's last theorem over larger fields 
Nov 11 
awarded  Nice Question 
Nov 11 
revised 
Coarse moduli spaces of stacks for which every atlas is a scheme
added 167 characters in body 
Nov 10 
revised 
Coarse moduli spaces of stacks for which every atlas is a scheme
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Nov 10 
comment 
Etale fundamental group of a curve in characteristic $p$
Tamagawa proved that for all profinite groups $G$, there are only finitely many smooth proper curves over $\bar{\mathbb F_p}$ (up to isomorphism) with etale fundamental group isomorphic to $G$. Maybe you can find something useful in his article; see Finiteness of isomorphism classes of curves in positive characteristic with prescribed fundamental groups, J. Algebraic Geom. 13 (2004), 675–724. 
Nov 9 
revised 
Coarse moduli spaces of stacks for which every atlas is a scheme
added 8 characters in body 