What is a Manifold? Lesson 1: Point Set Topology and Topological Spaces

This will begin a short diversion into the subject of manifolds. I will review some point set topology and then discuss topological manifolds. Then I will return to the "What is a Tensor" series. It has been well over a year since we began this project. We now have a Patreon Page:   / xylyxylyx   Please consider supporting this channel for more lectures about the deepest subjects ever studied!