User Stefan Keil

6 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

660 views

Results and conjectures on bounds on degrees of isogenies

asked Feb 27, 2013 at 13:46

4 votes

1 answer

283 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

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

6 votes

1 answer

653 views

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

asked Oct 7, 2013 at 10:11

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

957 views

Elliptic curves over QQ with identical 13-isogeny

asked May 6, 2013 at 10:31

17 votes

3 answers

740 views

Elliptic curves over QQ with isomorphic n-torsion

asked Feb 25, 2013 at 16:33

4 votes

1 answer

447 views

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

asked Apr 16, 2012 at 15:17

5 votes

1 answer

313 views

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

asked Jun 17, 2011 at 10:00

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

9 votes

2 answers

4k views

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

asked May 24, 2011 at 15:52

3 votes

0 answers

278 views

Tate-Shafarevich group of non-principally polarized abelian variety

asked Feb 1, 2011 at 16:46

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13 Questions

Number of Galois extensions of local fields of fixed degree

Results and conjectures on bounds on degrees of isogenies

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?

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

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

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

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

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

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

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

Tate-Shafarevich group of non-principally polarized abelian variety