6,799 reputation
1765
bio website kellertimo.de/index.html
location Germany
age
visits member for 5 years, 2 months
seen 7 hours ago

I am a postdoc of Uwe Jannsen interested in arithmetic geometry, especially Arithmetic of Abelian schemes, their $L$-functions and étale cohomology.

My two recent articles on the Tate-Shafarevich group and the conjecture of Birch-Swinnerton-Dyer for Abelian schemes over higher dimensional bases over finite fields can be found here:

http://arxiv.org/abs/1410.5293 and http://arxiv.org/abs/1410.5294


1d
answered Dieudonné modules -reference request
Mar
23
comment Evaluation maps for moduli of stable maps
For properness: If one has maps $f: X \to Y$ and $g: Y \to Z$ with $g \circ f$ proper and $g$ separated, then $f$ is proper. If $g \circ f$ is even projective, then $f$ is projective. (This is Hartshorne's "property $\mathcal{P}$".)
Mar
22
comment Existence of fine moduli space for curves and elliptic curves
Can you give me a reference for "no automorphisms => representable as an algebraic space"?
Mar
21
comment $\mathcal{M}_{g,n}$ a scheme for $n \gg 0$?
OK, I see. Thank you!
Mar
21
comment $\mathcal{M}_{g,n}$ a scheme for $n \gg 0$?
In this thread, Emerton only addresses this question for elliptic curves, and JSE only the question about automorphism groups (not the representability by a scheme).
Mar
21
asked $\mathcal{M}_{g,n}$ a scheme for $n \gg 0$?
Mar
17
accepted applications of Berkovich spaces
Mar
16
answered applications of Berkovich spaces
Mar
14
revised Equivariant and basic cohomology
edited title
Mar
13
asked applications of Berkovich spaces
Jan
18
awarded  Popular Question
Jan
13
revised Are there Néron models over higher dimensional base schemes?
added 60 characters in body
Jan
13
revised Are there Néron models over higher dimensional base schemes?
added 1 character in body
Jan
13
accepted Are there Néron models over higher dimensional base schemes?
Jan
13
comment Are there Néron models over higher dimensional base schemes?
Yes, you are right, exactly!
Jan
13
answered Are there Néron models over higher dimensional base schemes?
Jan
10
awarded  Yearling
Dec
23
awarded  Enlightened
Dec
23
awarded  Nice Answer
Dec
21
answered Hartshorne Proposition III 8.1