New posts in Algebraic Topology

How can I visualise the fundamental group of the projective plane?

Experiences using Brown's Topology and Groupoids in lieu of Munkres and Hatcher

Find $f$ such that $f^{-1}(\lbrace0\rbrace)$ is this knotted curve (M.W.Hirsh)

Universal covering space of the real projective line?

Is it true that $K(G \ast H, 1) = K(G,1)\vee K(H,1) $?

Linking number definitions: equivalent or not?

Why is this 3-manifold irreducible?

No Embedding From A Torus to A Sphere

Necessary condition on homology group of a set to be contractible

Fundemental group of $S^2$ with equator is identified $z \sim z^3$