TJCM's user avatar
TJCM's user avatar
TJCM's user avatar
TJCM
  • Member for 12 years, 11 months
  • Last seen more than 2 years ago
10 votes
4 answers
3k views

Why is an injective quasi-coherent sheaf's restriction to an open subset still an injective object?

9 votes
2 answers
1k views

Blow up along codimension one closed subscheme

8 votes
2 answers
3k views

Does the fiber product of two normal varieties remain normal?

7 votes
3 answers
3k views

When is a localization of a commutative ring finitely generated as an algebra?

7 votes
1 answer
2k views

Completion of modules of differentials (A strange exercise in Liu's AG textbook)

7 votes
1 answer
2k views

finite surjective l.c.i morphism is flat

6 votes
1 answer
986 views

The inverse limit of locally free module

6 votes
1 answer
261 views

Can the simplicity of abelian varieities be implied by the reduction

5 votes
1 answer
3k views

Simply connectedness of algebraic group

4 votes
1 answer
600 views

Does the fiber product of two regular varieties over perfect field remain regular?

3 votes
1 answer
2k views

Examples of Equivariant Sheaves under Group action

2 votes
1 answer
682 views

Maximal subfield inside a central division algebra

2 votes
2 answers
485 views

tamely branched cover over P^1

2 votes
2 answers
352 views

The algebraicity of Hodge structure map

2 votes
1 answer
401 views

Is line bundle determined by the parameter space and fiber?

2 votes
1 answer
609 views

Point at infinity on the moduli space of elliptic curves over finite field

2 votes
0 answers
594 views

Quotient of an algebraic group by the connected component containing identity

2 votes
0 answers
980 views

deformation of abelian varieties

1 vote
1 answer
722 views

Morphism between polarized abelian varieties

1 vote
1 answer
1k views

A useful form of principle of connectedness

1 vote
1 answer
420 views

Definition of congruence subgroup for non-matrix groups

0 votes
1 answer
589 views

The category of sheaves on a site that is not abelian

0 votes
2 answers
187 views

Intrinsic construction of other Galois extensions