New posts in Low Dimensional Topology

$4$-manifold with fundamental group $\Bbb Z/4\Bbb Z$

Why can't Antoine's necklace fall apart?

A "double" Möbius Strip

Six Octagons on a Surface with $\chi=-2$

Understanding a Bill Thurston popularization of knot complements

What are some applications of these specific pure math areas?

If a surface, M, has $\pi_1(M)=\mathbb{Z}\ast…\ast \mathbb{Z}$, is M a finitely punctured closed surface?

Grassmanian $(2, 4)$ homeomorphic to $S^2 \times S^2$

What's true in $\mathbb{R}^4$, false in $\mathbb{R}^3$ and uninteresting in $\mathbb{R}^5$?

What closed 3-manifolds have fundamental group $\Bbb Z$?