bio | website | |
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location | ||
age | ||
visits | member for | 4 years, 10 months |
seen | Dec 18 at 9:12 | |
stats | profile views | 1,353 |
Sep 30 |
awarded | Tumbleweed |
Sep 23 |
asked | singular locus of $\mathcal{A}_3(2)^{hyp}$ |
Sep 21 |
accepted | deformations of vector bundles on curves |
Sep 17 |
asked | deformations of vector bundles on curves |
Sep 4 |
asked | Action of $(\mathbb{Z}/2g\mathbb{Z})$ on quadratic forms on $\mathbb{Z}/2\mathbb{Z}$-vector space |
Sep 1 |
comment |
Top specialized journals
do you really think that J Topology is at the level of JDG or G&T? my (limited) perception is that it is a little lower |
Aug 25 |
comment |
symmetric theta structures and arithmetic subgroups
good point! it is not completely clear to me yet... :D just kidding: as I have edited, the reasons for which there are different actions of the modular groups on characteristics (one or two orbits) -depending on the level - is still unclear to me. |
Aug 25 |
revised |
symmetric theta structures and arithmetic subgroups
added 245 characters in body |
Aug 25 |
revised |
symmetric theta structures and arithmetic subgroups
edited tags |
Aug 25 |
revised |
symmetric theta structures and arithmetic subgroups
added 2 characters in body |
Aug 25 |
asked | symmetric theta structures and arithmetic subgroups |
Aug 13 |
accepted | orthogonal group in characteristic 2 |
Aug 13 |
comment |
orthogonal group in characteristic 2
Yes I meant the finite field of order 2, thank you! What is the precise book reference that you suggest? |
Aug 13 |
comment |
orthogonal group in characteristic 2
no, I am sorry, I should have explained. By even and odd I mean the Arf invariant of a quadratic form on a $\mathbb{Z}_2$-vector space. I will correct the question. |
Aug 13 |
asked | orthogonal group in characteristic 2 |
Jul 2 |
awarded | Inquisitive |
Jul 2 |
awarded | Curious |
Jun 30 |
comment |
Index of congruence modular subgroup of level (1,d)
Very nice proof. As far as I understand the same proof would not hold for even $d$, right? |
Jun 17 |
awarded | Investor |
Jun 9 |
comment |
Generating the symplectic group
There's a cute subgroup of $Sp(4, \mathbb{Z}_2)$ of index 6, which is the stablizer of an odd theta-characteristic (seen as a quadratic form on the 2-torsion point). I wonder if it is this one. |