New posts in Algebraic Topology

Specific examples of Eilenberg-Maclane spaces?

Closed orientable 4-manifolds with $H_2(M)\cong \mathbb{Z}$ do not admit free actions of $\mathbb{Z}/2$

Fundamental group of the real projective plane and its universal cover

Is the map $q: \mathbb{RP}^n \to \mathbb{RP}^n / \mathbb{RP}^{n-1}$ nullhomotopic?

Homotopy equivalence upper triangular matrices and torus

Computing $[\mathbb{R}P^2, S^k]$

Milnor's proof that a smooth manifold has the homotopy type of a CW complex

Automorphism group of the projective unitary group PU(N) and SO(N)

The cohomology ring of an oriented closed $3$-manifold with $\pi_1=\mathbb Z$

Does a topological space always admit a $\mathbb{Z}_2$-action?