2. Introduction to tensors.

MIT General Relativity, Spring 2020 Instructor: Scott Hughes View the complete course: YouTube Playlist: The notion of ’coordinate’ bases.  Several important 4-vectors for physics: 4-velocity, 4-momentum, 4-acceleration, and their properties.  1-forms, and tensors more generally.  Using the metric and its inverse to raise and lower tensor indices. Introduction to tensor fields. The number flux 4-vector, and its use in defining a conservation law. License: Creative Commons BY-NC-SA More information at More courses at Support OCW at We encourage constructive comments and discussion on OCW’s YouTube and other social media channels. Personal attacks, hate speech, trolling, and inappropriate comments are not allowed and may be removed. More details at