24,890 reputation
73376
bio website
location Adelaide, Australia
age 25
visits member for 2 years, 2 months
seen Nov 25 at 21:08

Taking a break for a while.


Aug
25
accepted Can we measure how close a vector bundle is to being trivial?
Aug
25
accepted The number of connected components of $SL(2, \mathbb{R})$ which keep $x^2 - y^2$ invariant
Aug
23
accepted Given an $(n-1)$-form $\varphi$ on a smooth orientable $n$-manifold, there is a vector field $v$ such that $i_v\varphi = 0$.
Aug
22
accepted Conformal map between $\mathbb{C}\setminus((-\infty, -1]\cup[1,\infty))$ and $\{z \in \mathbb{C} \mid 0 < \operatorname{Im}(z) < 7\}$
Aug
18
accepted Show that $S = \{f \in L^1(\mathbb{R}) \mid \int_{\mathbb{R}}f dm = 0\}$ is closed in $L^1(\mathbb{R})$.
Aug
17
accepted Show that the set of one-to-one holomorphic maps $\Bbb{C}\setminus\{a,b,c\} \to \Bbb{C}\setminus\{a,b,c\}$ forms a finite group.
Aug
17
accepted Show that the kernel of the map $SL(n, \mathbb{Z}) \to SL(n, \mathbb{Z}/3\mathbb{Z})$ has no torsion.
Aug
16
accepted Let $A$ be an $n\times n$ invertible complex matrix such that $A^7 = A^*$. Show that $A^8 = I$.
Aug
16
accepted If $E, F \subset [0, 1]$, $m(E), m(F) > 0$, and $E_n = \{x \in [0, 1] : nx \bmod 1 \in E\}$, show $m(F\cap E_n) > 0$ for sufficiently large $n$
Aug
16
accepted Exercise on Radon measures, constructing a convergent sequence
Jul
22
accepted $E \subseteq [0, 1]$, $m(E) > 0$. Show that there are $\alpha$ and $\beta$ such that $\alpha, \alpha + \beta, \alpha + 2\beta \in E$.
Jun
17
accepted Every non-trivial holomorphic involution on the open unit disc has a unique fixed point
Jun
13
accepted What is elliptic bootstrapping?
Jun
13
accepted What is a Kählerian variety?
Jun
13
accepted If $\omega^k$ is exact, is $\omega$ exact?
Jun
10
accepted Basic questions about $E[E[X \mid Y]]$
Jan
4
accepted Is every almost complex structure tame up to sign?
Dec
27
accepted Showing a group is isomorphic to a group with known presentation
Dec
19
accepted What is this group? (Recognising a group from a presentation).
Aug
28
accepted Cardinalities of generating sets for finite groups