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1838
bio website mathematik.uni-mainz.de/…
location Mainz
age 27
visits member for 4 years, 9 months
seen 9 hours ago

Post-doc at Johannes-Gutenberg 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
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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 + 2-1 +2-1 = 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