1,254 reputation
1520
bio website n/a
location Berlin, Germany
age 27
visits member for 2 years, 7 months
seen 3 hours ago

Currently a PhD student at HU Berlin. I'm interested in the geometry of moduli spaces of curves.


Jun
3
comment Theorems' names that don't credit the right people
Which is not at all wrong since the circumflex just denotes a left-out 's' from old French spelling.
May
22
awarded  Yearling
May
20
awarded  Constituent
May
7
awarded  Caucus
Jan
19
awarded  Informed
Dec
20
comment Find all polynomials that fix $\mathbb Q$ and the irrationals
For instance, $x^2$ will map $\sqrt{2}$ to $2$, and therefore be a counterexample.
Dec
19
comment Difference between a stalk of a sheaf and a fiber of a vector bundle
No need to be sorry. Next to each answer, under the arrows for up/downvoting, there is a little check mark. You can just click on the check mark belonging to the answer you like best to accept it. See here for some images explaining the process.
Dec
19
comment Difference between a stalk of a sheaf and a fiber of a vector bundle
Please consider accepting some answers to your previous questions. People will be less willing to respond if they think you won't appreciate their answers anyway.
Dec
16
comment Normality in a group $G$
Please supply some additional information, so that we can help you better. What have you done? Where are you stuck?
Dec
13
suggested rejected edit on Is $R = Q[x] / (x^4 - 3x^2+ 6x)$ isomorphic to a direct sum of two fields?
Dec
13
comment Is $R = Q[x] / (x^4 - 3x^2+ 6x)$ isomorphic to a direct sum of two fields?
We would appreciate it to see some thoughts of your own on this. Also, it is a bit rude to command us to prove it.
Dec
12
comment Let $G_1. …, G_k$ be any groups and $\sigma \in S_k$ a permutation. Prove the following map defines an isomorphism
Think about the inverse of the permutation.
Dec
11
answered Is the intersection of two quasi-compact open subsets of a scheme quasi-compact?
Dec
10
answered Find a normal extension over $\mathbb{Q}$ of degree 3
Dec
8
answered non-symmetric positive definite matrix!?
Dec
5
comment Is it true that if a graph is n-regular that it must have n+1 vertices?
I interpreted that as 'exactly', but you're right, maybe it was meant as 'at least'. Curiously, I didn't consider this, even if I used to draw two cards when someone told me to "Draw one card".
Dec
5
comment Is it true that if a graph is n-regular that it must have n+1 vertices?
No, it's not true. Google images for "3-regular graph" shows many counterexamples. A very famous one is the Petersen graph.
Dec
4
comment Is $\mathbb R^2$ a field?
Indeed, every finite-dimensional vector space $V$ over a field $\mathbb{F}$ is isomorphic to $\mathbb{F}^n$, where $n$ is the dimension of $V$. This fact impressed me a lot when I first learned it.
Dec
3
comment Conceptual question about equivalence of eigenvectors
Yes. The eigenvalue doesn't even need to be $1$.
Dec
2
answered Are rings with the same finite cardinality isomorphic?