The times they are a-changin’.
This post seems to be older than 11 years—a long time on the internet. It might be outdated.
“A manifold equipped with a metric tensor is known as a Riemannian manifold.”1
0Don’t ask why I’m reading about metric tensors if you don’t know what it is. If you do know what it is, please explain it to me like I’m 5 years old. ↩