16,171 reputation
32260
bio website chiasme.wordpress.com
location France
age 23
visits member for 2 years, 1 month
seen 8 hours ago

Aug
19
comment What does $GL_n(R)$ look like?
A related question: math.stackexchange.com/questions/692862/…
Aug
16
comment How to prove $\det(e^A) = e^{\operatorname{tr}(A)}$?
The result is known as Jacobi's formula: en.wikipedia.org/wiki/Jacobi's_formula
Aug
5
comment If $H$ is a subgroup of $G$, then the inclusion is a quasi-isometry if and only if $H$ has finite index in $G$.
Are all your groups finitely-generated?
Aug
4
answered Is a $0$-hyperbolic group free?
Aug
4
comment Examples of “Non-Logical Theorems” Proven by Logic
@KyleGannon: Some examples are given there math.stackexchange.com/questions/282144/…
Aug
2
asked Why does the sign $\times$ vanish in mathematical expressions?
Aug
2
comment Is a $0$-hyperbolic group free?
In fact, it was not $1$ but $\mathrm{l}$. It is clearer if I write $\ell$, sorry.
Aug
2
revised Is a $0$-hyperbolic group free?
deleted 12 characters in body
Aug
1
revised Is a $0$-hyperbolic group free?
edited body
Aug
1
answered Infinite geodesic rays leaving a K-quasiconvex subgroup stay K-close to it.
Aug
1
asked Is a $0$-hyperbolic group free?
Jul
29
accepted Extending cellular maps between aspherical complexes
Jul
21
awarded  Popular Question
Jul
21
asked Extending cellular maps between aspherical complexes
Jul
18
asked $\mathbb{F}_2 \times \mathbb{F}_2$ is not subgroup separable
Jul
17
comment Model theory in group theory
Sorry, it should be an "every". So it is a universal quantifier.
Jul
17
revised Model theory in group theory
added 2 characters in body
Jul
17
revised Model theory in group theory
added 410 characters in body
Jul
16
revised Right-angled Artin groups are residually finite
added 176 characters in body
Jul
16
answered limit of integral $n\int_{0}^{1} x^n f(x) \text{d}x$ as $n\rightarrow \infty$