what is the fundamental group of a torus with $k$ points removed
64021
Fundamental group of a torus with points removed
11393
The center of the dihedral group
133238
Why does $\mathrm{Tor}_0^R(M,N)\cong M\otimes_R N$?
154990
Fundamental group of two tori with a circle ($S^1✕${$x_0$}) identified
131519
intuition on the fundamental group of $S^1$
62128
Zariski Topology question
89843
Is the center of the fundamental group of the double torus trivial?
58484
Is the topological product $\Pi \{G_\alpha: \alpha < \kappa\} $ a topological group?
24039
Fundamental Group of Punctured Plane
90764
Prove that the fundamental group of the circle is non-trivial if the fundamental group of a space $X$ is non-trivial
156382
Why is Compactification restricted to Toroids, Calabi-Yau et al?
34670
What exactly is the fixed field of the map $t\mapsto t+1$ in $k(t)$?
67805
Why is fundamental group insufficient to classify manifolds?
23517
Presentation $\langle x,y,z\mid xyx^{-1}y^{-2},yzy^{-1}z^{-2},zxz^{-1}x^{-2}\rangle$ of group equal to trivial group
122665
Help finding the fundamental group of $S^2 \cup \{xyz=0\}$
154303
Degree $1$ map from torus to sphere
90192
Kernel and Image of a group homomorphism