481 reputation
614
bio website none
location Mexico
age 28
visits member for 4 years, 9 months
seen Nov 11 at 14:03
PhD student. I work on non-commutative Iwasawa Theory.

Jul
8
comment Union of conjugates of a subgroup
I think for abelian groups there's no hope since the minimal submonoid containing the complement is the full group.
Jul
7
comment Coherent sheaves and Mitchell's embedding theorem
Edited the question following abx suggestion.
Jul
7
revised Coherent sheaves and Mitchell's embedding theorem
added 117 characters in body; edited title
Jul
7
comment Coherent sheaves and Mitchell's embedding theorem
@abx you're right, should I edit the question?
Jul
7
asked Coherent sheaves and Mitchell's embedding theorem
Jul
2
awarded  Curious
Mar
22
awarded  Nice Question
Sep
15
awarded  Nice Question
Jun
12
awarded  Popular Question
May
13
comment Diameter-area ratio for affine tranformations.
I guess $F$ must have positive area. This is trivialy false if $F$ is a line segment.
May
6
awarded  Yearling
May
6
comment Galois group of constructible numbers
Thanks for pointing me to this bibliography, I have a lot to read now.
May
6
comment Galois group of constructible numbers
Thanks @Chandan Singh Dalawat and @François Brunault for your enlightening comments.
May
6
accepted Galois group of constructible numbers
May
6
awarded  Nice Question
May
6
awarded  Commentator
May
6
revised Galois group of constructible numbers
added detail; added 170 characters in body
May
6
comment Galois group of constructible numbers
@Brunault so (correct me if I'm wrong) it must contain the field generated by the Tate module $T_2(A)$ for every abelian variety $A$ of dimension $2n$ such that the Galois group is $\mathrm{GL}_{2n}(\mathbb{Z}_2)$. That looks like a nice result.
May
6
comment Galois group of constructible numbers
@Chandan Singh Dalawat Yes, in fact $\mathrm{Gal}(K_{n+1}/K_n)$ is isomorphic to a countable product of copies of the group of order two. But already $\mathrm{Gal}(K_2/K_0)$ seems difficult to me, it properly contains the field $K_0(\sqrt[4]{K_0})$ which has Galois group over $K_0$ isomorphic to the semidirect product of $\mathbb{Z}/2\mathbb{Z}$ by a countable product of copies of $\mathbb{Z}/4\mathbb{Z}$
May
6
revised A characterization of convexity
corrected spelling