User Stefan Keil

18 votes

3 answers

1k views

Do isogenies with rational kernels tend to be surjective?

asked Feb 27, 2013 at 18:27

17 votes

1 answer

970 views

Elliptic curves over QQ with identical 13-isogeny

asked May 6, 2013 at 10:31

17 votes

3 answers

743 views

Elliptic curves over QQ with isomorphic n-torsion

asked Feb 25, 2013 at 16:33

9 votes

2 answers

5k views

Picard number and torsion of Neron-Severi group of abelian varieties over a number field

asked May 24, 2011 at 15:52

7 votes

5 answers

3k views

Number of Galois extensions of local fields of fixed degree

asked Jun 23, 2011 at 15:01

7 votes

1 answer

667 views

Results and conjectures on bounds on degrees of isogenies

asked Feb 27, 2013 at 13:46

6 votes

1 answer

659 views

Centralizers of elements in general linear group over Z mod prime power

asked Oct 7, 2013 at 10:11

5 votes

1 answer

316 views

connected component of the identity section in the special fiber of the Neron model under isogenies

asked Jun 17, 2011 at 10:00

4 votes

1 answer

453 views

Why is the kernel of reduction a pro-p group?

asked Apr 16, 2012 at 15:17

4 votes

1 answer

286 views

Is there a formula for a hyperelliptic curve over QQ, such that its Jacobian contains a rational torsion point of extact order n, for any given n?

asked Nov 6, 2013 at 15:29

3 votes

0 answers

279 views

Tate-Shafarevich group of non-principally polarized abelian variety

asked Feb 1, 2011 at 16:46

3 votes

0 answers

193 views

rational points of component group of the special fiber of the Neron model

asked Jun 17, 2011 at 11:58

2 votes

1 answer

130 views

When are K-automorphisms of the n-torsion of an elliptic curve E/K liftable to K-endomorphisms of E?

asked Nov 6, 2013 at 15:18

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13 Questions

Do isogenies with rational kernels tend to be surjective?

Elliptic curves over QQ with identical 13-isogeny

Elliptic curves over QQ with isomorphic n-torsion

Picard number and torsion of Neron-Severi group of abelian varieties over a number field

Number of Galois extensions of local fields of fixed degree

Results and conjectures on bounds on degrees of isogenies

Centralizers of elements in general linear group over Z mod prime power

connected component of the identity section in the special fiber of the Neron model under isogenies

Why is the kernel of reduction a pro-p group?

Is there a formula for a hyperelliptic curve over QQ, such that its Jacobian contains a rational torsion point of extact order n, for any given n?

Tate-Shafarevich group of non-principally polarized abelian variety

rational points of component group of the special fiber of the Neron model

When are K-automorphisms of the n-torsion of an elliptic curve E/K liftable to K-endomorphisms of E?