New posts in At.Algebraic Topology

Conditions under which the preimage of a submanifold in nontrivial in homology

On the Euler number of an orbit space

Solving polynomial equations in spectra?

Complement to a union of spheres in a sphere

Any shortcuts to understanding the properties of the Riemannian manifolds which are used in the books on algebraic topology

Regular or h-regular CW-complex structure for the Poincaré homology sphere

CW-presentation of configurations of points in plane and space

Euler characteristic of the simplicial complex of sets of elements in a semilattice with non-zero meet

Normal invariants

Does the union of the subcomplexes of $X$ that contain a given subcomplex and whose inclusion in $X$ is trivial on $\pi_1$, have trivial $\pi_1$?