8.286 The Early Universe (Fall 2013, MIT OCW). Instructor: Professor Alan Guth. The Early Universe provides an introduction to modern cosmology. The first part of the course deals with the classical cosmology, and later part with modern particle physics and its recent impact on cosmology.
(from ocw.mit.edu)
Lecture 12 - Non-Euclidean Spaces: Open Universes and the Spacetime Metric
In this lecture, the professor reviewed a closed three-dimensional space and implications of general relativity; and talked about open universe and the spacetime metric.