Important additions to this new edition include:
- A completely new coordinate free formula that is easily remembered, and is, in fact, the Koszul formula in disguise
- An increased number of coordinate calculations of connection and curvature
- General fomulas for curvature on Lie Groups and submersions
- Variational calculus has been integrated into the text, which allows for an early treatment of the Sphere theorem using a forgottten proof by Berger
- Several recent results about manifolds with positive curvature