New posts in Algebraic Topology

What are the known examples of closed, connected and simply connected manifolds of positive Euler characteristic?

Loch Ness monster and Jacob's Ladder Surfaces are NOT homeomorphic

Can the fundamental group detect all ways to not have a section?

On the equivalence of several definitions of the torus

Structure of the Mapping Cylinder of a Continuous Function

Are there exotic balls?

Fundamental group of Klein Bottle

Compute $\pi_2(S^2 \vee S^2)$

Characteristic classes, Möbius strip, and the cylinder

Ext and Tor duality