I believe Absil, Mahony, and Sepulchre also have a book on optimization over manifolds: https://press.princeton.edu/absil https://press.princeton.edu/absil I

I believe Absil, Mahony, and Sepulchre also have a book on optimization over manifolds: https://press.princeton.edu/absil https://press.princeton.edu/absil I was unaware of the Bournal work, so thanks for that. Do you have any idea how Bournal's approach differs from Absil's? For others, it looks like Bournal also has a book on the topic from 2023: https://www.nicolasboumal.net/book/ https://www.nicolasboumal.net/book/