Timo Keller

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Name Timo Keller
Member for 1 year
Seen 16 hours ago
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Location Germany
Age
I am a PhD student of Uwe Jannsen interested in arithmetic geometry.
May
6
 comment Galois group of constructible numbers
... or in "Cohomology of number fields".
May
4
 revised Stiefel-Whitney class
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May
4
 revised Stiefel-Whitney class
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May
4
 answered Stiefel-Whitney class
May
3
 answered The prime number $2$
Apr
23
 comment When are Abelian schemes projective?
Also thanks to you!
Apr
23
 comment When are Abelian schemes projective?
Thank you very much!
Apr
23
 asked When are Abelian schemes projective?
Apr
22
 comment a question on Brauer groups and trivialised Azumaya algebras
Thank you very much for this nice proof!
Apr
22
 asked a question on Brauer groups and trivialised Azumaya algebras
Apr
22
 comment pushforward of injective sheaf acyclic for cohomology with supports
Thanks to both of you.
Apr
20
 revised pushforward of injective sheaf acyclic for cohomology with supports
added 74 characters in body
Apr
20
 revised pushforward of injective sheaf acyclic for cohomology with supports
added 330 characters in body
Apr
19
 revised pushforward of injective sheaf acyclic for cohomology with supports
edited body
Apr
19
 comment Albanese dual to the Picard scheme
Thank you. I will have a look at it.
Apr
19
 comment Albanese dual to the Picard scheme
Thank you. I will have a look at it.
Apr
19
 comment Albanese dual to the Picard scheme
Thanks. Unfortunately, I am interested in the result in positive characteristic.
Apr
19
 revised pushforward of injective sheaf acyclic for cohomology with supports
added 91 characters in body
Apr
19
 revised pushforward of injective sheaf acyclic for cohomology with supports
added 9 characters in body; added 2 characters in body
Apr
19
 asked pushforward of injective sheaf acyclic for cohomology with supports
Apr
17
 asked Albanese dual to the Picard scheme
Apr
15
 comment Algebraic machinery for algebraic geometry
Eisenbud, Commutative Algebra with a view towards Algebraic Geometry?
Apr
8
 answered Elliptic curve over a scheme is a group scheme?
Mar
27
 answered Why is a proper, affine morphism finite?
Mar
20
 answered About equivalent statements of the Birch and Swinnerton-Dyer Conjecture
Mar
8
 comment Constants sheaves on an open subset
@Fernando: See [Hartshorne, Algebraic Geometry] Exercise II.1.19 ("Extending a sheaf by zero").
Mar
8
 comment Constants sheaves on an open subset
You have to distinguish $j_!\mathbf{Z}$ from your $\mathbf{Z}_U$ above.
Mar
8
 answered Constants sheaves on an open subset
Mar
7
 comment Class numbers of the field generated by 2^{1/n}
See also mathoverflow.net/questions/88288/…
Feb
23
 awarded ● Popular Question
Feb
14
 revised every abelian scheme quotient of a Picard scheme?
deleted 1264 characters in body
Feb
5
 comment purity for finite flat group schemes
Thank you very much!
Feb
4
 revised purity for finite flat group schemes
added " is $\neq 0$"
Feb
4
 asked purity for finite flat group schemes
Feb
4
 accepted Fundamental Group and Etale Cohomology
Feb
2
 comment every abelian scheme quotient of a Picard scheme?
Thank you very much!
Feb
2
 comment every abelian scheme quotient of a Picard scheme?
Thanks to all of you for your response!
Feb
2
 answered every abelian scheme quotient of a Picard scheme?
Dec
20
 revised Fundamental Group and Etale Cohomology
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Dec
20
 revised Fundamental Group and Etale Cohomology
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Dec
20
 revised Fundamental Group and Etale Cohomology
added tags
Dec
20
 revised Fundamental Group and Etale Cohomology
added 57 characters in body; added 49 characters in body
Dec
20
 answered Fundamental Group and Etale Cohomology
Nov
28
 answered Is it known if the absolute Galois group is “divisible”?
Nov
23
 awarded ● Yearling
Nov
19
 revised every abelian scheme quotient of a Picard scheme?
added 50 characters in body