Discreteness and Homogeneity of the Topological Fundamental Group
arXiv:0904.4739
Abstract
For a locally path connected topological space, the topological fundamental group is discrete if and only if the space is semilocally simply-connected. While functoriality of the topological fundamental group for arbitrary topological spaces remains an open question, the topological fundamental group is always a homogeneous space.
8 pages, 2 figures