334 reputation
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location Deutschland
age 30
visits member for 4 years, 9 months
seen Jun 17 '13 at 11:40

Jul
2
awarded  Curious
Jun
25
awarded  Promoter
Jun
10
comment notion of torsor defined by exact sequence
It helps . Thank you very much!
Jun
10
accepted notion of torsor defined by exact sequence
Jun
10
revised notion of torsor defined by exact sequence
added 2 characters in body
Jun
10
revised notion of torsor defined by exact sequence
added 1 characters in body; deleted 2 characters in body
Jun
10
asked notion of torsor defined by exact sequence
May
18
comment extending truncated Barsotti-Tate group
I haved see Illusie's paper, it is true even in some affine case ($X$ is affine ), but I think it may has obstruction in case of smooth projective curve.
May
17
asked extending truncated Barsotti-Tate group
Feb
5
revised what are the possible CM-fields of PEL type shimura varieties ?
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Feb
4
comment what are the possible CM-fields of PEL type shimura varieties ?
@Mikhail: I mean the maximal commutative subalgebras of endomorpisms of the corresponding abelian varieties of CM-type.
Feb
2
revised what are the possible CM-fields of PEL type shimura varieties ?
edited title
Feb
2
comment what are the possible CM-fields of PEL type shimura varieties ?
@Mikhail: In my notation E is just your Z, and The PEL type shimura variety I mentioned is exactly the "auxiliary Shimura variety of PEL-type". And My question is about the CM-point of this "auxiliary Shimura variety of PEL-type", In fact I even wonder is there any classification of CM-fields for given PEL-type shimura datum.
Jan
25
revised what are the possible CM-fields of PEL type shimura varieties ?
added 180 characters in body
Jan
25
asked what are the possible CM-fields of PEL type shimura varieties ?
Jan
16
comment Diferent abelian varieties over local field with the same p-adic representation?
So if we require that these two Abelian varieties are ordinary, then the answer will be no ?
Jan
16
accepted Diferent abelian varieties over local field with the same p-adic representation?
Jan
15
asked Diferent abelian varieties over local field with the same p-adic representation?
Nov
26
comment global section of vector bundle and reduction
I understand know, thank you for your help!
Nov
26
comment global section of vector bundle and reduction
And in your counterexample , $H_1$ is a linebundle, of course locally free, and $H_0=\mathcal{O}_{C_0}$ is even free. Do I misunderstanding?