You can find the latest PDF in the Releases.
Some freely accessible material, which could provide more pictures, different points of view and further developments of the material:
- A pictorial introduction to differential geometry leads to Maxwell's equations with three pictures
- Manifolds and differential forms has fantastic figures
- Discrete Differential Geometry by Keenan Crane is a beautiful introduction to differential geometry and its use in three-dimensional geometry processing
- Lectures on the geometry of manifolds by Liviu Nicolaescu go way beyond this course up until a discussion of elliptic operators and Dirac operators
- Lecture series by Frederic Schuller are high-quality lectures from the point of view of theoretical physics
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