User contributions
- 07:07, 10 January 2019 (diff | hist) Talk:Surface groups as subgroups of hyperbolic groups (Ex) (top)
- 07:02, 10 January 2019 (diff | hist) N Talk:Surface groups as subgroups of hyperbolic groups (Ex) (Created page with "<wikitex>; Since $G$ is hyperbolic, it does not contain $\mathbb{Z}^2$ as a subgroup. Using Geometrisation, we can therefore conclude that $G$ is the fundamental group of a cl...")
- 06:07, 10 January 2019 (diff | hist) Talk:Extensions of groups (Ex) (top)
- 06:01, 10 January 2019 (diff | hist) N Talk:Extensions of groups (Ex) (Created page with "<wikitex>; Suppose that $G$ is the fundamental group of a closed irreducible $3$-manifold $M$, and that we have the exact sequence $1 \to H \to G \to \mathbb{Z} \to 1$. If $H$...")
- 06:29, 8 January 2019 (diff | hist) Talk:Fundamental groups of surfaces (Ex) (top)
- 06:08, 8 January 2019 (diff | hist) N Talk:Fundamental groups of surfaces (Ex) (Created page with "<wikitex>; Let $S$ be a surface. Suppose $\chi(S)\geq 0$. Then $\pi_1(S)$ is finite and hence hyperbolic. Suppose $\chi(S)\leq 0$. Then the interior of $S$ is a quotient of $...")
- 12:52, 7 January 2019 (diff | hist) m Talk:Three dimensional Heisenberg group (Ex) (top)
- 12:48, 7 January 2019 (diff | hist) Talk:Three dimensional Heisenberg group (Ex)
- 12:45, 7 January 2019 (diff | hist) N Talk:Three dimensional Heisenberg group (Ex) (Created page with "<wikitex>; Let $T$ be a torus and let $y$ and $z$ be generators of $\pi_1(T)\cong\mathbb{Z}\oplus\mathbb{Z}$. Let $f:T\rightarrow T$ be a homeomorphism of the torus such that ...")